Personally, I develop for py27 and py35 at home, and outside of a few edge cases, most things are covered by six to the point that I don't think it's hard to d

Personally, I develop for py27 and py35 at home, and outside of a few edge cases, most things are covered by six to the point that I don't think it's hard to develop new code that is compliant with both. What is hard is updating code bases that stretch back almost 2 decades. It's just a lot of code. IMHO the industry should start updating now rather than digging a bigger hole but c'est la vie.