To be fair, Python 2.x is installed everywhere and python 3.x wasn't really usable in production until 3.3. And there's barriers to migration like Twisted has.

To be fair, Python 2.x is installed everywhere and python 3.x wasn't really usable in production until 3.3. And there's barriers to migration like Twisted has. It's been a lot of years, but people are slowly and finally starting to migrate to 3. It could be worse. I'm still waiting for perl6 because those guys got caught up in Haskell hell.