According to the python community survey of 2014, 80% of users are still using Python 2. Of course, that was two years ago, but 2014 was still six years after Python 3 was released. (https://wiki.python.org/moin/2.x-vs-3.x-survey)

If the python developers were any normal business, they would have abandoned Python 3 and returned back to developing what their customers obviously prefer; the problem here is that the python developers essentially concluded that because users get python for free, they aren't customers at all and the python developers can do whatever they want and their users will eventually be forced to fall into line.

Except they won't...

Python users are refusing to migrate to Python 3 as a community. It's a shame that the python developers have decided to try to show their customers who is boss because it won't work--the developers will lose. Many people will continue with 2.7 forever and fork the language in 2020 like Perl 5 day. The rest, like me, have dumped python and moved on to greener pastures.