Well now you're getting onto my personal reason why I don't adopt Python 3. Python 2 will remain just as useful as it's been. Python 3 will not significantly extend that usefulness.

So I don't think there's much to be gained.

The 3 syntax and new features are not massively better than the sweet spot hit by 2, they're not even incrementally better. They're just massively more complicated.

So the cost/benefit ratio of Python 2 to 3 just isn't there. People are changing up because it's "the done thing" not because they really gain anything.

I was surprised as hell when I realized I wouldn't use Python 3, but it is a rational and considered opinion.