I am a Python beginner but would like to contribute $0.02 in absence of authoritative answers (thanks Tim J. for encouragement).
After researching this topic for a while, it looks like they now recommend distributing wheels rather than sdist's. For Windows thus is reasonable, given that there is no C/C++ compiler that is 'standard' and easy to install, and also because pre-compiled binaries can be signed. Regards, -- dd -- https://mail.python.org/mailman/listinfo/python-list