The community is not divided anymore. Anybody who knows wants to use 3. Anybody who doesn't is told to. The only people using Python 2 are now people stuck with legacy code base. It's an important part, but the situation is very clear.

I take it on a project by project basis. We have a bunch of legacy 2.x stuff running at work but when I began to greenfield new projects I made them 3.0 from the start. Folks at work asked why I made our codebase mixed with Python versions and I answered because I'm creating isolated tool projects from scratch and have no real constraints to use Python 2. It's made some issues for folks having to install both versions of python but it's been a pretty minor issue thus far.

Python 3.0 was released December 3rd, 2008, 8.5 years ago.

I don't really remember all that clearly, but my recollection is that numerous caveats were made fairly clear (like the new IO not being optimized and so on). I guess something needed to go out the door but I wonder if the biggest mistake was calling that release the 3.0 release (rather than something that would have better tempered naive expectations).

This. I don't care if I'm using Python 2 or 3, but I really hate switching between two similar, but not completely equal, languages. The rift made Python more damage than a forceful switch would, IMHO of course.

It's gained much more momentum over just the last year from what I can see.