The problem with your analogy is that while a lot of people did move from python to python 3, a lot also stopped using python all together because the python2/3 split demonstrated that the python devs were willing to throw everyone's work out the window for fun. There was no technical reason why backwards comparability wasn't possible. Multiple good solutions were put forward. They were all rejected for silly reasons.

A lot of that "python2 will never die" crowd left python all together, and they are better off for it because they won't have to deal with the next time python decides to throw everyone's work out the window.