Oh, it's a game now? Back when I dabbled with it (early 2000s) it was a simulator as the name says. Flightgear is an open source simulator that, according to pilots, feels more realistic.
I actually had to look it up as I couldn't remember why I made the first switch. PolyMC was forked from MultiMC after they dropped third-party modpack support. Then there was some drama with one of the devs of PolyMC, spawning Prism Launcher
It uses the system dialogue, but it starts from the same directory each time. If I'm saving files it's usually multiple files in succession, so I want the dialogue to start off pointed at the last directory I saved to. The Arch build does that.
Not to mention changing BIOS settings to allow booting from external media. I've yet to see 2 machines that were the same in that regard, so good luck writing instructions that a casual user could follow.
I usually can't find what I'm looking for, so a larger catalogue would go a long way. I also had problems with some software versions. The one that comes to mind is that Firefox had behavior with the save dialogue that I don't like. It's a minor issue, but one that I don't have with the build in the Arch repo. I have a vague memory of something just not working, but I couldn't tell you what at this point.
Steam Deck is weird. I mean, I love it, but coming from vanilla Arch it can be frustrating at times. Discover is terrible. Luckily, Distrobox is a thing.
Hm...could be useful for those times you want to read a guide but can only find one in video form