> Windows/MSVC defines DLLs as separate programs, with their own lifetime and entry point (e.g. you can reload a DLL multiple times and it will be reinitialised each time).

All of this is true of so's in ELF also.  It doesn't mean that the implementation needs to reject standards-conforming programs.

I still think the Python documentation is incorrect on this point.  I filed https://bugs.python.org/issue45306 to track this separately.