I would not count on all major distros maintaining support for processors as old as Core 2 forever.

RHEL 9 in particular (and by extension CentOS Steam, Alma, Rocky) already dropped support for all of the processors affected by this breakage since 2022.

Linux systems often group these CPU feature set generations into levels, where “x86-64-v2” requires SSE4 and POPCNT (Nehalem/2008 and newer) and “x86-64-v3” requires AVX2 (Haswell/2013 and newer).

Ubuntu and Fedora are already evaluating optimized package builds for both v2 and v3 but haven’t announced any plans to drop baseline x86-64 yet; I wouldn’t be surprised to see it happen within the next two years. Debian is a relatively safer bet for old hardware.