Encountering SIGILLs is not super uncommon on heterogeneous academic computer clusters (since -march=native).
But yeah, typically binaries built for redistribution use a reasonably crusty minimum architecture. Reminds me of this discussion for Fedora: https://lists.fedoraproject.org/archives/list/[email protected]...
I don't recall encountering a "Intel-locked" or "AMD-locked" application in more than 20 years of using x86. Ok, maybe ICC, but that one kind of makes sense :-)