Not true any longer, at least for the binary packages I produce[0]. I switched them over to trunk-based builds a while ago, which are updated every few days.
$ pkgin se python3
python35-3.5.1nb2 Interpreted, interactive, object-oriented programming language
python34-3.4.4 Interpreted, interactive, object-oriented programming language
python33-3.3.6nb3 Interpreted, interactive, object-oriented programming language
along with a bunch of pre-packaged modules: $ pkgin avail | grep ^py3 | wc -l
1412
Let me know if anything you need is missing and I'll add it.I have just found a related issue: https://github.com/joyent/pkgsrc/issues/331 Unfortunately, from what I read there, I have still to use homebrew or install from python.org (with those I have no issue). I really enjoyed pkgin otherwise.