Vitalik proposed optimizing Ethereum's finality mechanism: replacing Casper FFG with Minimmit.

Vitalik Buterin, in an article on the X platform, stated that in discussions regarding the Ethereum consensus mechanism, a proposal is underway to replace the current finality component, Casper FFG, with the new Minimmit. He argues that Casper FFG employs a two-round finality mechanism (validators need to sign twice to complete "proof" and "final confirmation"), while Minimmit only requires one round of signing to achieve finality. As a trade-off, Minimmit's fault tolerance threshold will decrease from 33% in Casper FFG to approximately 17%. Despite the reduced fault tolerance, Minimmit is more likely to lead the network into a state of "multi-chain competition rather than erroneous final confirmation" under various attack or client vulnerability scenarios, a situation that is easier to recover from through community coordination. He believes that compared to erroneous blocks being finalized, avoiding finality in the short term is safer and more recoverable, therefore Minimmit may be superior in terms of overall security trade-offs.