I run into DLL hell any time I try to install some software that isn't in some sort of package repository or other happy path. Most recent example I can think of was about a year ago when I helped my father-in-law install Klipper on an RPi4 so that he could do input shaping on his 3d prints. All of the guides and documentation seemed to assume that you were using a specific version of Linux on the RPi, and if you weren't (like my FIL) then welcome to dependency hell. Took several hours of pulling my hair out to resolve them all, for a non-developer it would have been impossible.
So the installation story for klipper is hilariously bad. Its a shell script that apt installs and pip installs things as root. It is the very definition of non-portable.
The distribution story for Python apps in general is fairly bad and the developer really takes it to the next level.
This isn't DLL hell as a function of leaving the happy path its DLL hell as a function of burning the happy path whilst dancing naked on the ashes of the greenery that once was the happy path.
See Calibre for willful disobedience vs instead of insanity. It eshews system libraries and uses a shell script to install but it dumps everything including Python libs in a directory.
Well it's slightly comforting to know that my experience with Klipper wasn't unique, at least. I have an Ender 3 but don't really do anything beyond the basics with it so I hadn't heard of Klipper prior.
