I really think people obsess way too much about the Python 2 to 3 disaster. Obviously, we can’t break things and slow down the language and not give people better language features… I’m not sure why the Python devs thought that would work. In the mean time Ruby had a very successful transition from 1.8 to 2.0, Java and C# have made many major releases, PHP has had a several of major releases, and so on. Julia itself has managed six major releases.
Here are some of my previous thoughts on the Python 2 to 3 transition: