CERN leaves RHEL and moves its 2,200 control computers to Debian 13

A RHEL and CentOS institution for two decades, CERN announced in late August 2026 that it is moving its 2,200 industrial accelerator-control computers to Debian 13 by the end of the year, with the -march=x86-64-v2 flag as the trigger. For any long-lived industrial or embedded fleet, the lesson fits in one line: watch your distribution’s CPU baseline.