[cdavid]

Breaking stuff is worthwhile if it brings other things in exchange. Cleaner is almost never a good enough reason in my experience. New features is what makes people willing to upgrade. People will evaluate whether porting is worth the pain over this feature vs effort line. Armin is not the only one who wonders whether it really is worths it.

[wladimir]

But as more and more new features are being added to 3.x and not to 2.x (and assuming 3.x won't break compatibility with itself), won't there automatically be a point in which the features are worth the pain?

Even if not, the python devs are not trying to define this point for anyone, you can stay with 2.7 the rest of your life if you want to. I don't think a "2.x will no longer be maintained even for bugfixes" date has been established.

[cdavid]

There may be a point at which the features may worth it, I don't see why it should be automatic.

Python 2.x is not going away, but staying at 2.7 is not a long term solution either.