In an extremely technical forum post, Buterin outlined a two-step plan to shift Ethereum’s state management to validators and replace per-epoch balance updates with a single daily ZK-STARK proof.Buterin said this could help scale Ethereum to “millions of validators,” while reducing validator state to roughly 6 bytes.This weekend, Buterin said the series of upgrades to overhaul “Lean Ethereum,” essentially redesigning the blockchain’s entire consensus and execution layers, could take around four years.