The kinds of things you need to do in order to maintain a stable ABI are not the kinds of things you should apply to all parts of your program. That way lies madness.
BTW, you don't need accessors even for public ABIs. stat(2), for example, doesn't need "accessors" for struct stat and it's been stable for decades. The same idea applies to Win32 core APIs.
BTW, you don't need accessors even for public ABIs. stat(2), for example, doesn't need "accessors" for struct stat and it's been stable for decades. The same idea applies to Win32 core APIs.