Ethereum co-founder Vitalik Buterin congratulated the zkSync Airbender team on their milestone progress, stating that the speed war for zkEVM (zero-knowledge Ethereum Virtual Machine) has been decisively won. He believes that the primary focus for zkEVM should now fully shift to security, specifically including formal verification of the equivalence between arithmetization and Ethereum specifications, hard maximum limits on prover costs and block gas, and the security of the proving system itself.