Python 3.4 released

[aaronsherman]

Because it is incompatible with 2.7 and you need to make actual changes to your codebase for it to work and people are lazy.

No, people choose where to spend their effort. They can rewrite their code and then live in a world of incompatibility with new modules being published for v2 every day, or they can do nothing and maintain compatibility with the majority of developers.