Sophon has officially set November 25, 2026, as the final deadline for users to withdraw their SOPH, ETH, USDC, and unclaimed staking rewards before its zkSync-based Layer-2 mainnet permanently shuts down on November 30. The decision to sunset the standalone chain and pivot toward consumer app development on Base stems directly from infrastructure economics, with the team previously noting that maintaining dedicated sequencers, bridges, and RPC nodes was burning roughly $3.4 million annually without sufficient fee capture. Alongside similar sunset announcements like Igloo's Abstract chain, this exit highlights a quiet reality check across the rollup ecosystem: running a boutique L2 is expensive, and an increasing number of teams are deciding that building directly on top of massive, established liquidity hubs beats paying millions each year to subsidize their own isolated chains. If you've got deposits or Guardian yields sitting on Sophon, now's the time to bridge them out before RPC connectivity goes dark.