Vitalik Buterin warned that decentralizing rollups prematurely can reduce overall security by increasing reliance on immature proof systems

Quotes that support claims

Buterin said the best time for a protocol to go decentralized is when its onchain proof system is safe enough that the centralized components serving as a point of failure or collusion risk becoming the bigger threat. This is because until a system is proven to be secure enough, decentralization, which increases the reliance on this system, may end up making the system less secure.

In the rush to fully decentralize rollups, Vitalik Buterin has shared an important reminder that is easy to forget: stage 2 is not always more secure unless the underlying proof system is impenetrable. He clarified in a post, presenting a condensed mathematical model, that moving too quickly to stage 2 without appreciably enhancing proof robustness could actually raise the failure rate.