But this just highlights the case with JavaScript even more. In JavaScript nobody is tied to any framework, and they can easily leave for another browser at any time. Heck, with jQuery, it doesn't even matter if you're writing ECMAScript 3 or 6, everything still pretty much works the same out of the box.

At the end of the day there's a lot to be said about the transition from 2 to 3, but I think in general the Python community got off easy compared to some of the breaking changes in other language communities.