Adobe lightroom vs darktable. Don't get me wrong, I still use darktable instead of lightroon,, but my god, it is incredibly unstable and everything is just harder to do.
I've installed Darktable probably 10 times in the past 5 years, and uninstalled it immediately after. Basically collecting its .exe files at this point.
There's just something about the UI that makes it daunting and unappealing to use for me. I'm hoping more FOSS programs can get the Blender treatment with UI/UX improvements and a ton of fundind.