Ventura removes all the fallbacks for pre-Haswell CPUs and it now just assumes that AVX2 is available. Even if you can persuade it to boot on older CPUs I'd be

Ventura removes all the fallbacks for pre-Haswell CPUs and it now just assumes that AVX2 is available. Even if you can persuade it to boot on older CPUs I'd be pretty surprised if it actually works "just fine".