Who cares about the ABI when the current ABI has a bunch of bad issues with it. For any backwards compatibility thing there is always AI that can rewrite old code.
The compiler vendors care. It is also the reason why C++ never actually had a GC, even if the standard had it specified (and removed it with C++23).
The compiler vendors care. It is also the reason why C++ never actually had a GC, even if the standard had it specified (and removed it with C++23).