Not necessarily, you can use a CI pipeline to verify that your project can be build with many Python versions. This is the workflow I use here[0]. It makes catching and fixing breaking changes easier. Plus, I'm confident the core team is not likely to introduce a painful breaking change (think Python 2 -> 3) soon[1]

0: https://github.com/rmpr/atbswp

1: https://mobile.twitter.com/gvanrossum/status/130608247244308...