Ethereum co-founder Vitalik Buterin has suggested reducing withdrawal times for stage 1 optimistic rollups from the current 7 days to just 1-2 days. This proposal aims to enhance user experience by speeding up transactions while still ensuring security. Stage 2 rollups will continue to have a 7-day security period. The proposed change could increase the attractiveness of Ethereum's Layer 2 solutions and drive further adoption.