[nine_k]

Isn't installing different versions an OS concern, not the Python's concern? I bet Debian and NixOS have very different takes on that, to say nothing of macOS and Windows.

I also suppose that pyenv and poetry exist and solve that to a reasonable extent.

[ihusasmiiu]

One could say that providing Python modules is an OS concern as well.

Debian IMHO has the worst take on that (see the venv module).

Pyenv definitely solves it, but I talked about an officially supported solution.