ICON plans to permanently shut down its blockchain on December 31, 2026 and migrate its ecosystem from ICX to a new ERC-20 token, SODA, on the Sonic chain. Holders must complete the ICX-to-SODA swap before September 30, 2026 to maintain access, with the deadline creating a cutoff ahead of the network's final closure. The move marks a full transition away from ICON's existing chain infrastructure and gives users a limited window to convert their holdings before the shutdown takes effect.