According to TechFlow, Vitalik published an article on how to improve the transaction confirmation time of Ethereum users. He mentioned that although Ethereum has shortened the transaction confirmation time to 5-20 seconds through EIP-1559 and the merged stable block time, there is still room for further improvement.

The article outlines several practical improvements, including single-slot finality and Rollup pre-confirmation mechanisms. Vitalik also discussed a pre-confirmation-based approach, which he believes can provide faster transaction confirmation guarantees for L1 and L2.