Vitalik Unveils Lean Ethereum: A Three-Year Overhaul for Scalability and Security

Ethereum co-founder Vitalik Buterin has outlined Lean Ethereum, a multi-year plan to revamp the network's underlying architecture. The goal is to make the network's core smaller, easier to verify, and more resilient while allowing scaling work to happen through Layer 2 networks.

The overhaul will focus on simplifying transaction verification, reducing state storage costs, improving privacy, enhancing quantum resistance, and strengthening Layer 2 scaling. Buterin has described Lean Ethereum as the network's third major protocol iteration, following its original launch and the 2022 Merge.

The changes are expected to arrive gradually through multiple upgrades, with the upcoming Hegota upgrade marking the final major step before the Lean Ethereum era begins in earnest. The new architecture will rely on recursive STARKs for transaction verification, making proof-based verification a core part of the protocol.