Pip has dropped support for Python 2
This is awesome in terms of avoiding all of the weird things when a person typed pip rather than pip3 and module didn't seem to get installed anywhere. That said, watching perl trying to kill perl5 with perl6 (unsuccessful) and python trying to kill python 2 with python 3 (more successful) it struck me how ridiculous it is that open source languages have to put up with this. Clearly "major" numbers are insufficient, the only real answer is to rename the entire freaking language when you make incompatible changes to it.