ABI changes do happen. gcc had an ABI change in std::string because of C++11. It was long and painful, but everyone survived, the world did not end
Contrary to the FOSS compile from source culture, other platforms have a different point of view on ABI breaks.
Which is why Valve ended up using Proton.
> ABI changes do happen
Will never happen on Windows, especially not in user-mode libraries, and especially not something this pervasive.