Vitalik sets out Lean Ethereum as the network’s next long-term rebuild
On July 5, 2026, Vitalik Buterin published a detailed post on X introducing Lean Ethereum, a long-term roadmap he described as Ethereum’s third major phase after the Merge. It is not a single upgrade. The plan spans the next three to four years and covers protocol changes across verification, cryptography, finality, state storage, privacy, and client architecture.
The roadmap arrived during a broader period of organizational reshuffling around Ethereum. In the source article’s framing, the proposal needs to be read not just as a list of technical changes, but as a redesign of the tradeoff between migration costs and verification barriers, with a separate question hanging over it: how, and when, any of this could feed into ETH pricing.
Three eras of Ethereum
The article breaks Ethereum’s development into three generations.
The first was the original “PoW + EVM” architecture, where every node re-executed every transaction. That model delivered security, openness, and generality, but it also constrained scalability.
The second began with the 2022 Merge, when Ethereum moved to proof-of-stake. That shift changed the network’s security model, issuance model, and staking structure, and showed that Ethereum could replace a core engine without shutting down.
The third is the newly proposed Lean Ethereum era. Here, the network moves past the familiar division where L1 handles settlement and L2 handles scale. Instead, L1 performance, proof-based verification, privacy, quantum resistance, state design, and client structure are treated as parts of one long rebuild.
A strawmap through 2029, with five explicit goals
Lean Ethereum was published at strawmap.org, a public draft first put forward in February by Ethereum Foundation researcher Justin Drake. The document maps out seven network upgrades through 2029. The word “strawmap” is taken from “straw,” and the file describes itself as a modifiable draft rather than a fixed schedule. It also says the roadmap is a coordination tool still in progress, with each upgrade subject to research, testing, client work, and rough consensus.
Five long-term strategic goals are listed:
- Faster L1 finality
- L1 throughput of 1 gigagas per second, with capacity for tens of thousands of TPS in extreme cases
- L2 expansion toward a teragas-scale ecosystem
- Comprehensive quantum-safe cryptographic security
- Native private transfers on L1
Against current usage, those targets are aggressive. Based on Etherscan data cited in the article, Ethereum L1 now processes about 32 transactions per second on average, or roughly 2.7 million a day. A 1 gigagas target would represent a several-hundred-fold jump in compute capacity.
L1 demand, the article notes, has actually been rising over the past year. Daily transactions climbed from 1.4 million in mid-2025 and have mostly stayed in a 2 million to 2.9 million range in 2026, with peaks near 3.6 million during the market highs in April and May. In that reading, the roadmap is meant to meet a recovery in onchain activity that is already underway.
The timetable also marks out a dividing line. Hegotá, currently scheduled as Ethereum’s second upgrade in 2026, could be the last hard fork before the Lean era. Every upgrade after that would, in theory, fall under this rebuild. Before then, the nearer-term Glamsterdam upgrade is expected to bring a meaningful increase in the gas limit, though it had not gone live at the time of the article despite earlier expectations for the first half of 2026.
Timing quickly became one of the most contested points. Dankrad Feist, the former Ethereum Foundation core researcher who proposed Danksharding, wrote on X that he supported the strawmap but said a three- to four-year window was too slow, arguing that with current large language model tools the upgrade should be achievable within a year.
Proof-based verification, quantum resistance, and finality changes
At the center of Lean Ethereum is a different verification model. Today, Ethereum secures correctness by having each node re-execute each transaction. The new design would make recursive STARK proofs a native part of the protocol: one prover handles the heavy computation, while other nodes verify a compact mathematical proof.
That choice is tied to a second issue: quantum safety. STARKs rely on hash-based cryptography and, according to the article, there is currently no known quantum attack path against them. Ethereum’s current signature scheme does carry that risk. Vitalik said the priority of quantum security has been “substantially” raised, and the roadmap proposes gradually replacing quantum-vulnerable components with Winternitz signatures. One urgent item is finding a quantum-safe design for blobs, which L2s use to lower costs.
The consensus layer is also in scope. On Ethereum today, a transaction can be included onchain within seconds, but finality takes about 15 minutes. The new design separates the continuously block-producing chain from finality itself, aiming to settle transactions after one or two rounds of validator voting and compress that 15-minute window toward near-real time.
The roadmap also mentions multidimensional gas pricing, where compute, storage, and data transfer are priced separately instead of being rolled into one fee bucket.
A new storage split: 2 TB for dynamic state, 100 TB for a new state layer
The state redesign would directly affect application developers. Ethereum’s state is the live ledger of balances and smart contract data, and it grows over time. Full nodes currently have to maintain a complete copy, which keeps storage costs high.
Vitalik’s proposal restructures storage into layers. The existing “Dynamic State,” described in the source article as the core area, would be capped at a 2 TB hardware threshold to stop unlimited growth. Alongside that, the protocol would add a new storage layer with capacity up to 100 TB and a more scalable architecture.
In Vitalik’s 2030 scenario, most ERC-20 tokens, NFTs, and standard DeFi applications could cut transaction fees by more than 10x if they are willing to rewrite contracts and move into that new storage layer. The protocol would not force the shift or subsidize it. It would simply leave a large price gap between the two layers and let applications choose when to migrate.
Privacy moves from add-on to protocol objective
The roadmap also changes how privacy is positioned inside Ethereum. The old division was simple: onchain activity stayed public, and users who wanted privacy turned to third-party systems. This time, Vitalik wrote, “Privacy is no longer an afterthought, it is a first class goal.”
The article interprets that as a protocol-level change in mindset. Future components would be tested at the design stage for whether they can support privacy without intermediaries, at low cost, and with quantum resistance. Whether Ethereum can fully deliver that remains open, but the standard itself is now written into the roadmap.
The EVM replacement debate and why L2s care
One of the most contentious parts of the plan is the execution engine. Ethereum has run on the EVM for a decade, and the world of contracts, tooling, and languages around it was built on that base. Vitalik is now proposing a replacement because of the same proof-generation problem: producing mathematical proofs over EVM execution is expensive, while a more proof-friendly engine could lower costs significantly.
The named candidates are RISC-V and leanISA. In the end state described in the article, the new engine would become the protocol’s native machine, while the EVM would remain as a translation layer. Old contracts would still run, but only after being translated into the new instruction set.
The idea has drawn debate since Vitalik first floated a RISC-V direction in April 2025. Offchain Labs, the core developer behind Arbitrum, argued publicly last November that WebAssembly, or WASM, would be the better architecture. WASM does not appear on Vitalik’s latest shortlist. That matters because Arbitrum, one of Ethereum’s largest L2s, built its Stylus contract technology on WASM.
As the source article puts it, changing L1’s engine is like redefining the plug standard for the whole ecosystem. If an L2 already uses the same plug, it connects directly. If not, it pays for an adapter.
Ethereum does not have a formal voting system to settle this type of dispute. Whether the engine changes at all, and what it changes to, will depend on rough consensus in All Core Devs meetings and whether client teams are willing to build it. For now, the engine swap remains a long-term objective in Vitalik’s words, and no formal conclusion has emerged from developer meetings.
What this means for ETH pricing
The article maps the roadmap’s impact on ETH across two different time frames.
The first is the mechanical transmission path. Since EIP-1559, Ethereum has burned the base fee on every transaction. That means the scale of L1 activity affects ETH supply dynamics and settlement value directly. If the gigagas target is reached and L1 activity rises with higher throughput, gas use and burn would rise as well. That is the most direct link between the roadmap and ETH valuation.
Still, the article stresses one condition: higher capacity does not create demand on its own. The pricing link works only if usage comes back after capacity expands.
The second issue is timing. Lean Ethereum is a phased project meant to unfold over three to four years. During 2026, the roadmap will not change Ethereum’s present state by itself. It is a directional commitment, and Ethereum has a record of delays on long-range commitments. The Merge itself arrived years later than early estimates.
Put differently, the roadmap lifts Ethereum’s long-term ceiling but does not solve ETH’s medium-term value-capture problem. The criticism from analyst Ignas, as cited in the article, lands on exactly that point: the plan does not include changes to ETH’s own token economics.
The watchlist for the next phase
The article closes with a practical takeaway. The strawmap raises Ethereum’s long-term upside, but it does not immediately fix ETH’s medium-term value capture, so this is not presented as a moment to FOMO purely on the roadmap.
Instead, it points readers to a near-term watchlist:
- Whether the Glamsterdam upgrade launches smoothly and delivers a higher gas limit
- Whether blob demand keeps growing with L2 activity
- Whether L1 fee revenue and ETH burn improve
- Whether L2 growth feeds back into L1 through blob fees and settlement demand
- Whether ETH’s relative performance against BTC recovers
According to the article, those indicators map to different parts of the roadmap and can be checked week by week through public dashboards such as Etherscan and DefiLlama. Their movement, more than the roadmap document itself, will show the market whether this three- to four-year rebuild is being delivered or pushed back.