eikenberry asked: "can just run all my python2 programs with python3 runtime with no changes at all"

You replied: "Nearly all my code co-runs on 2.7 / 3.6 with almost no hacks. So, yes.", implying that, yes, you can run py2 programs without change, because this is true of your code

To which I replied "And your code is all code?"; Meaning, just because this is true of your code, doesn't mean it is true of eikenberry's code, or any/all code.

You then responded with a project that apparently runs fully on py3, but only partially on py2 - what is the point you are making by posting that project?