This PEP doesn't really stop functionality for nearly 3 years and even then it's only with the newest Python version so people can stay on the older version for

This PEP doesn't really stop functionality for nearly 3 years and even then it's only with the newest Python version so people can stay on the older version for another 2-3 years of further transition fully supported by the Python community. In 5 years, Windows 10 will be the bare minimum for a secure OS from MS.