> CERN engineers had considered moving to CentOS Stream as a more natural pathway but ultimately they say "the straw that broke the camel's back" to abandon Red Hat Enterprise Linux for their industrial accelerator-control computers was the "-march=x86-64-v2" compiler flag default as "forced obsolescence" for old hardware.

Incompatibility with x86-64-v2 means that CERN is running some older machines, over 15 years old:

https://en.wikipedia.org/wiki/X86-64#Microarchitecture_level...