CoinDesk
Vitalik Buterin has outlined an updated Lean Ethereum roadmap, calling it the third major iteration of the network after the 2022 Merge and a plan to replace nearly every major piece of the protocol over three to four years while keeping disruption to existing applications low. The plan lands as ether rose more than 12% on the week to about $1,777, among the strongest performers among the majors.
Quantum safety has moved sharply up the priority list. The roadmap now treats replacing every quantum-vulnerable component, including the cheap data storage rollups depend on, as urgent, even though a sufficiently powerful quantum computer capable of breaking that cryptography is still years away. Privacy has been promoted to what Buterin called a first-class goal rather than an afterthought, with core network components redesigned so that private, intermediary-free transactions become the default path rather than an opt-in feature.
Why it matters
The framework also redraws how Ethereum checks itself. Instead of every node re-running every transaction, the network plans to lean on recursive STARKs, a cryptographic proof method that lets a node verify a compact proof of correctness rather than repeating the work, in a bid to make validation faster and lighter. Underneath that, the most disruptive change is to state itself: today's flexible "dynamic" state would be allowed to grow only moderately, with new, more restrictive and cheaper-to-scale state types added alongside it. The combination is meant to let Ethereum's state expand from roughly 2 terabytes today to over 100 terabytes by 2030 without every node having to carry all of it the old way.
Further out, Buterin said Ethereum will likely need a virtual machine beyond the EVM, with the open RISC-V architecture among the leading candidates, and floated the EVM staying as a higher-level convenience while the protocol itself runs on the simpler base. Running through the plan is a steady lift in capacity, with transaction ceilings rising, data limits growing and block times shrinking repeatedly over roughly five years.
Frequently asked questions
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What is the Lean Ethereum roadmap?
Lean Ethereum is a multi-year technical framework, first laid out in July 2025 and updated in July 2026, that aims to overhaul nearly every major part of the protocol over three to four years while minimizing disruption to existing applications.
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Why is quantum resistance moving up the priority list?
Researchers warn a sufficiently powerful quantum computer could eventually break the cryptography securing blockchains. Buterin's update treats replacing every quantum-vulnerable component, including the cheap data storage rollups depend on, as urgent even though that capability is still years away.
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What changes for privacy in the new roadmap?
Privacy has been promoted to a first-class goal rather than an afterthought. Core network components are being redesigned so that private, intermediary-free transactions become the default path through the network instead of an opt-in feature.
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How does Ethereum plan to handle state growth?
Lean Ethereum would cap growth of the current flexible dynamic state while adding new, more restrictive and cheaper-to-scale state types. The combination is meant to let state expand from roughly 2 terabytes today to over 100 terabytes by 2030 without every node carrying all of it.
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What are Glamsterdam and Hegotá?
Glamsterdam is the next Ethereum upgrade and is expected to deliver a large capacity increase. Buterin said the fork after it, Hegotá, is likely the last before the Lean era fully begins.
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