Could say, "I live my life 9 seconds at a time."
rivalary
For the time being, Proton is good enough for me. I think devs/publishers refusing to enable their chosen anticheat to work with Proton is what is holding things back now for tech people. For other people, there's even bigger challenges, and I doubt they even read up on these "tech nightmares" so they're good with just continuing on with Windows.
The maintainer of the application chooses the categorie(s) but manually organizing things as an end user... is kinda dumb. Maybe I don't understand your workflow (or why the Start Menu is the way it is now with all programs barfed into one list, I figured it was for touch devices). It doesn't really matter, though, because search is used primarily now, anyways. Forgetting the name of the application is the only reason I can see digging through the Start Menu now.
I switched from EmuDeck to RetroDeck, mainly because I wanted to sync everything between multiple computers using SyncThing and EmuDeck throws data everywhere (mainly due to using Flatpaks).
I set up RetroDeck the way I wanted it and then I ran the installer for EmuDeck, choosing the option to uninstall (was a while back, my mind is hazy on the details). It actually did uninstall it, though I think I had to delete a couple directories. It was pretty cleanly uninstalled, from what I recall.
Now I only have to sync one directory for RetroDeck, which also makes backups easy. The install also feels a lot more simple.