Given the many ways of creating virtual environments it's becoming more usual for a program's installation to create a specialist virtual environment just to support that application (pre-commit is. good example of this technique). Perhaps that'a a way ahead?
It's quite ugly, and I try to make sure I write modules that can be built to a standard wheel and installed that way. (Poetry makes this fairly easy, incidentally.)
Doing development on the projects without a specialised build environment, though, is almost hopeless. You either have to manually install a bunch of stuff (e.g. I use ruff, used to use ruff and black, used pre-commit, and a few other things), and then there's the non-Python things that need to be installed (like specific fonts in my case). At this point I just impose Poetry as basically a requirement for development.
The program does build and function in a non-Poetry environment which is what I use for production.
