I am unhappy with python. It degrades fast. It deprecates libraries every minor release and that tends to break the applications I use. Recent examples are distutils and opsaudio.
Sure, for "applications", the ecosystem can be frustrating at times, but I don't think that's what we're talking about here.
I still work on projects that were written under 3.6.
If you care enough, you can also use something like asdf to install an older Python alongside the system one.