One of the reasons I made pip-chill is to create an incentive to not bother with version numbers and just make your software always run against the latest versions. If something breaks, fix it. If it's too hard to do it, maybe you depend on too many things. Leftpad feelings here.

Having your software depend on two different versions of a library is just asking for more pain.

BTW, I still need to fix it to run on 3.12+ in a neat way. For now, it runs, but I don't like it.