It is the decision of the respective packagers which version theyprovide and how much effort they want to put in. If you have issues
with their decisions, you could try to submit a bug report to their
respective bug trackers.
Btw., Debian and Ubuntu provide PL/Python for Python 2 and 3, so it's
possible. And it happened because someone submitted a bug report, and
someone put in the effort. ;-)
I guess this mailing list topic has got enough EDB people eyeballs, but is not touching enough.
I suspect time will be spent more productive creating windows build environment and building required thing by oneself.
Personally, I think the Windows packagers made a mistake by providing
Python 3 only at this point.
+1