I'm so glad to see this. I started with Python 1.4, and after several years too long on 2.6+ I've just recently been able to convince an employer to start a new codebase on Python 3.5. Having used it in production now, I would not willingly go back. Python 2.7 is excellent, but Py3 feels like "Py2 done right". It's at least as nice in every way and much nicer in quite a few.

I'm in a shop with solid microservice underpinnings, so our new project could just as easily have been in Go or something else for all its clients would know or care. Given that all the libraries we wanted to use were already available for Py3, this was a no-brainer. There were plenty of reasons to upgrade and no compelling reasons to stay on Py2. Should you find yourself in such a situation, I highly recommend investigating whether you can make the same move.