Vitalik Buterin confirms Ethereum is preparing its 'biggest rebuild' since the Merge
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Ethereum co-founder Vitalik Buterin has a fresh set of takeaways on "Lean Ethereum," the multi-year plan to rebuild nearly every major part of the network, following research meetings.
Key facts
The thoughts land as ether rose more than 12% on the week to about $1,777, per CoinDesk data, among the strongest of the majors
The ambitious Lean Ethereum idea was first laid out in July 2025 as a technical framework for the network's next decade, built around superior cryptography compared with most methods currently in use
But Ethereum now treats replacing every quantum-vulnerable part with a quantum-safe alternative as urgent, Buterin said, including a redesign of the cheap data storage that rollups, the layer-2
Ethereum co-founder Vitalik Buterin has a fresh set of takeaways on "Lean Ethereum," the multi-year plan to rebuild nearly every major part of the network, following research meetings
Summary
Vitalik Buterin outlined an updated “Lean Ethereum” roadmap that aims to overhaul nearly every major part of the network over three to four years while minimizing disruption to existing applications. The plan sharply elevates quantum resistance and privacy, redesigning cryptography, data storage for rollups and core protocol features so that private, intermediary-free transactions and quantum-safe components become defaults. Lean Ethereum would cap growth of today’s flexible state while adding new, more scalable state types, adopt recursive STARKs for lighter verification, and eventually move beyond the current EVM, all while steadily increasing Ethereum’s capacity through upcoming upgrades like Glamsterdam and Hegotá.