Ethereum researchers are discussing a design that borrows from the UTXO model to reduce state bloat on the network. Under the proposal, simple transfers would no longer keep full transaction-related data in active memory indefinitely. Historical blockchain records would be checked only when needed, while active memory would store a single bit showing whether a transaction output has already been spent. Wahrstatter, who introduced EIP-8141, said this approach could reduce unnecessary data growth from basic transfers on Ethereum’s base layer by 99.8%.
Frame Transactions target storage costs in the account model
The proposal is built around a long-standing issue in Ethereum’s account-based structure. Wallet balances must remain stored as active data, and even one-off transactions continue to consume blockchain memory after they are completed. Wahrstatter’s “Frame Transactions” would shift simple payments toward a single-use structure rather than keeping them as persistent active records.
UTXO, or unspent transaction output, is the model where each new payment consumes a previously unspent output. eUTXO is an extended version used by Cardano to support more advanced functions, including smart contracts. Ethereum researchers are now examining whether ideas from that model can help manage the network’s memory burden, especially for basic base-layer transfers that do not need permanent active-state storage.
The proposal is still early, and compatibility may decide its fate
The idea has entered the initial Strawman discussion stage inside the Ethereum community, with Vitalik Buterin among those following the conversation. That keeps it far from implementation. Any move of this scale would need technical review, but that is only part of the process. Compatibility with existing applications would have to be assessed in detail before any architectural change could be considered practical.
That is where the biggest concern sits. Ethereum has long been defined by its account-based design, while UTXO is more commonly associated with Bitcoin, a system focused mainly on value transfer and limited smart-contract capacity. Cardano extended the concept through eUTXO to support more flexible application infrastructure. If Ethereum adopts a hybrid structure with UTXO-like elements, many DeFi applications already running on the network could face adaptation and compatibility risks.
Hoskinson ties the technical debate to old fault lines
Cardano founder Charles Hoskinson reacted sharply to the development. According to the source material, he split from Ethereum in 2014 after disagreements with Vitalik Buterin over the network’s commercial direction and long-term architectural roadmap. Hoskinson also argues that there is an unspoken taboo within the Ethereum ecosystem against acknowledging his contributions.
For him, the discussion is not only about engineering choices. Cardano was designed around the eUTXO model from the beginning as a response to scaling challenges, while Ethereum spent years presenting the account model as the opposing path. With Ethereum researchers now considering features inspired by that logic to address memory constraints, some observers see it as indirect validation of approaches developed elsewhere. Ethereum is left weighing two broad paths: keep managing its growing database under the current design, or explore a more radical hybrid architecture.