Why do people hesitate using Python 3? – Programmers – Stack Exchange
Python 3 has been released in December 2008. A lot of time has passed since then but still today many developers hesitate using Python 3. Even popular frameworks like Django are not compatible with Python 3 yet but still rely on Python 2.
Sure, Python 3 has some incompatibilities to Python 2 and some people need to rely on backwards-compatibility. But hasn’t Python 3 been around long enough now for most projects to switch or start with Python 3?
Having two competing versions has so many drawbacks; two branches need to be maintained, confusion for learners and so on.