Try opening an old project from 3-5 years ago that has a lot of dependencies like something from react-native, Django, etc. and you’ll find many of them impossible to even install without using the original Python or Javascript versions - that’s assuming the oldest dependencies are still available in the pinned versions.

It’s not a common use-case, I guess, but I had some old projects that I abandoned and wanted to try working on them again and found it almost impossible. The worst cases had dependencies which weren’t available unless I used an x86 laptop with an older version of Mac, because the packages were never built for arm laptops.