Vitalik Buterin has softened his vision for Ethereum's Layer 2 solutions and is now advocating for native rollups. The Ethereum co-founder pointed out that many Layer 2 projects have failed in achieving decentralization and are still being mediated through multi-signature bridges, rather than inheriting the security benefits of Ethereum itself. He emphasized the importance of developing solutions that fully leverage Ethereum's security model and decentralization, rather than relying on intermediaries that could compromise the network's integrity.