Vitalik  Buterin said genuine security requires gradual alignment of governance and cryptographic integrity rather than ticking a decentralization checkbox

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Even so, a strong proof system is necessary for stage 2 to be safer. Buterin suggests employing proof system multi-sigs, which combine several separate proof systems as a temporary measure to reduce these risks. According to him, stage 2 is not the only thing that matters. In addition to the rollups, decentralization phase ecosystem tools such as l2beat should monitor the maturity of proof system audits. Achieving true security involves a gradual alignment of governance and cryptographic integrity; it is not a checkbox.