there are a few Windows games running on Linux via Steam Play (Proton), that [the previous vm.max_map_count] limit can actually be exceeded – DayZ, Hogwarts Legacy, Counter Strike 2, and other games.

Sounds good, especially if Ubuntu, Fedora, and other distros have already made this change. Are there any downsides to raising this value?

Wasn’t there also something related to Yuzu that needed this to be upped for certain games too?

I know it’s not the same thing, but this kinda reminds me of the old GDI object limit in Windows which had an upper limit of 65,536. If you reached that limit your system would start exhibiting all sorts of weird glitches, including not being able to launch any apps even if you had plenty of free RAM.