Java's GatewayFirmware.checkNAT and SwitchFirmware.checkSAT look every second from the start, so an entry goes up to a second late. The engine expires both exactly at their age: better than Java where Java only samples, as long as saved files stay compatible (decided 01.10.2026). The switch did so already; its departure is now named in the code. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>