On Friday, May 30, 2025, Sebastian Wittmeier via Std-Proposals wrote:

Another topic is about interface ownership. Even if the internal Microsoft memory format can be reverse-engineered and would currently work in a stable way, you codify it into an international standard. That is not nice, you are taking away Microsoft's ownership over their ABI.

The best thing would be just to ask Microsoft to add this feature to their "cl.exe" program. It wouldn't be a one-way road -- Microsoft executables would also be able to link successfully with GNU g++ DLL's, or Embarcadero DLL's. If we got everyone on board with it then it would make sense to standardise it with classes and functions like std::abi and std::abi_wrap.

I've emailed guys in Microsoft before but I never get a reply, not even that Raymond Chen guy who has a decent blog.