Vitalik Buterin has published an updated long-term roadmap for Ethereum, calling the multi-year effort “Lean Ethereum” as the network's biggest redesign since the Merge. He posted it to X on July 4, 2026, days after Ethereum researchers gathered in Berlin to work on the protocol's long-term trajectory.
Buterin's post carries significant weight for developers building on Ethereum, layer-2 networks that settle transactions on the chain, and ETH holders watching how the blockchain evolves without disrupting existing applications. The Ethereum co-founder says that every core component will be rebuilt, but slowly, over the next three to four years. According to Buterin's post, the revised plan now lives in Ethereum's public strawmap.
Ethereum to Go Through a Phased Rebuild
Buterin stated that his key takeaways from the Berlin gathering is that “Lean Ethereum” is not a single one-shot upgrade. He added that “it is a collection of improvements that will come online to the Ethereum network over the course of three or four years.”
However, he also pointed out that this will be the third major iteration of Ethereum, comparing it to the Merge, which is the second major iteration when the network moved from a proof-of-work (PoW) consensus mechanism to a proof-of-stake (PoS) system. Buterin wrote that “almost every major piece of the protocol will be replaced.”
The technical scope is wide. The roadmap proposes swapping direct transaction re-execution for recursive STARK-based verification. Buterin also pointed out that they are replacing everything that is quantum-vulnerable with alternatives that are quantum-safe, adding that it is a major priority. He also added that they will be reworking consensus toward one- or two-round finality, introducing multidimensional gas pricing, moving to new state architectures, and making changes to client architecture.
Buterin stated that the changes can be done in a way that minimizes disruption to the existing application, pointing to the Merge as evidence that Ethereum can execute large upgrades. The cofounder stated, “We've done this before (the Merge), we can do it again.”
Privacy and Quantum Defense Get Prominent Roles
Buterin said future protocol design will treat privacy as built in. “Privacy is no longer an afterthought; it is a first-class goal,” he wrote. He added that developers are now asking questions that touch on how well intermediary-free, quantum-safe privacy is supported without heavy overhead when designing new components such as Frames, the mempool, and additions to the state tree.
Quantum resistance has climbed the list too. Buterin said work on quantum-safe blob designs has already run for several months.
A State Model Built for 2030
The most far-reaching idea concerns how Ethereum stores data. Buterin stated that “there is growing consensus around leaving present-day-style 'dynamic state' mostly unchanged, but scaling it only a medium amount.” He added that consensus also supports adding new types of state that are easier to scale at large, but also relatively more restrictive.
Buterin gave an example stating that it is possible that Ethereum in 2030 will be holding about 2 TB of present-day-style (dynamic) state alongside 100 TB of a newer, more scalable design suited to ERC-20 tokens, NFTs, and many DeFi uses, while decentralized exchanges and on-chain order books stay on the existing model. Migration would be optional but financially attractive, not mandatory.
Buterin also floated moving past the Ethereum Virtual Machine (EVM) entirely, toward an execution environment such as RISC-V or leanISA, with the EVM eventually acting as a compiler target rather than the engine itself.
Ethereum Foundation Context and Market Turbulence
The roadmap lands during a turbulent stretch for Ethereum's institutions. Buterin stated in a June post that the Ethereum Foundation is cutting its budget by about 40% this year. It shed 54 jobs, roughly 20% of staff, on June 22. Also, several departed researchers have regrouped at Ethlabs, a new nonprofit that says it can fund operations for two to three years.
The ETH market has also taken a hit in recent times, although it is not unique to it alone, as funds are reportedly moving from crypto into AI investments. ETH currently trades around $1,760, down over 64% from its August 2025 high of $4,953.73.
What This Means for Ethereum's Ecosystem
The "Lean Ethereum" roadmap is more than a technical checklist; it is a statement about the project's priorities. By focusing on recursive STARK-based verification, Ethereum aims to reduce the computational burden on nodes and make transaction processing more efficient. STARKs, or Scalable Transparent Arguments of Knowledge, are cryptographic proofs that allow one party to prove to another that a computation was performed correctly, without needing to re-execute the computation. This could dramatically increase throughput and reduce costs for layer-2 networks that rely on Ethereum for settlement.
The push for quantum-safe designs is equally significant. While practical quantum computers that can break current cryptography may still be years away, Ethereum's developers are trying to future-proof the network. This includes replacing cryptographic primitives that are vulnerable to Shor's algorithm and ensuring that new state designs are resistant to quantum attacks. This is a long-term bet meant to reassure institutional users that Ethereum will not require a hard fork scramble when quantum machines arrive.
The proposed shift toward multidimensional gas pricing is another important development. Currently, Ethereum uses a single gas market to price computational work, data storage, and blob space. Multidimensional gas pricing would create separate price markets for different resources, allowing validators and users to pay prices that reflect actual supply and demand for each resource. This could make block space allocation more efficient and reduce weird cross-subsidies that exist today.
The state model changes are particularly relevant for decentralized applications that handle high volumes of tokens and NFTs. By adding new, more scalable state types, Ethereum hopes to accommodate massive datasets without bloating the core state that all nodes must maintain. The idea is to keep the existing dynamic state for complex smart contracts and introduce "static" or more restricted state types that are easier to process in parallel. This could allow Ethereum to scale to hundreds of terabytes of state data while keeping node requirements manageable.
Moving beyond the EVM is a more controversial idea. The EVM has been the standard execution environment for Ethereum smart contracts since its inception, and it is supported by a vast ecosystem of tools, auditors, and developers. But the EVM is also a bottleneck for performance and has inherent design limitations. RISC-V is an open instruction set architecture that is widely used in hardware and could offer a simpler, more efficient target for executing smart contracts. leanISA is a custom instruction set that the Ethereum team has been exploring for years. If Ethereum moves to a new execution environment, existing Solidity contracts could still run via the EVM as a compiler target, but new applications might be written in languages that compile directly to RISC-V or leanISA.
The timeline of three to four years means that these changes will roll out incrementally. Hard forks and network upgrades will likely be phased, with some changes coming earlier than others. The difficulty is ensuring that each step remains backward compatible with what is already deployed on Ethereum, or at least provides migration paths that are optional for users. The Merge in 2022 was a successful example of a massive upgrade that did not disrupt applications, but it did require careful coordination among client teams, stakers, and exchanges.
In the near term, Ethereum's roadmap is being shaped by institutional pressures as well. The Ethereum Foundation's budget cuts and the departure of researchers to Ethlabs could change the governance dynamics of the project. Some observers are concerned that a leaner Foundation might have less capacity to fund research, coordinate protocol development, and manage external relations. Others believe that the emergence of a new nonprofit like Ethlabs could actually increase the resilience of Ethereum's research ecosystem by diversifying funding sources.
For ETH holders, the roadmap is a reminder that Ethereum's value proposition rests on continuous innovation. The price decline from its August 2025 high of $4,953.73 to around $1,760 reflects a broader market rotation toward AI investments, but also some unease about Ethereum's competitive position vis-à-vis faster and cheaper blockchains. The promise of a leaner, more scalable Ethereum is intended to address those concerns, but the market is likely to wait for concrete milestones rather than roadmap announcements.
As the Berlin workshop concluded, the Ethereum community is left with a clear sense of direction: the protocol will become more modular, more focused on verifiable computation, and more prepared for the quantum era. The "Lean Ethereum" roadmap is not a one-time event, but a continuous process of replacing legacy parts with more modern, efficient, and secure alternatives. Whether it can deliver on its ambitious promises will depend on the collective efforts of researchers, client developers, application teams, and the broader community. Buterin's confidence is rooted in Ethereum's track record of pulling off complex upgrades, and the next few years will test that confidence again.
Source: MSN News