[notnullorvoid]

I used to have issues with Steam flatpak, but it's been 2-3 years now without any issues.

Discord also works, it doesn't support some features, but that has nothing to do with flatpak and everything to do with Discord on Linux in general.

I've got a dozen or so other flatpak apps that work flawlessly.

One major complaint though is it can keep old unused versions of runtimes around and you manually have to remove them, Nvidia and Mesa runtimes for some reason consistently have this issue. Even running `flatpak uninstall --unused` does not remove them.