skimm

Changes aren’t lost on update. If you enable a sudo user/password, and make changes to the system that way, those changes can be lost when applying the new system image.

Its an immutable Arch-based distro and you have full readwrite to your home directory and all config, settings, and files within persist.

That will depend per game as far as I know.

Native vs wine/proton locations will vary and even when emulating windows some games use “My Games”, “My Documents”, %APPDATA%, etc for the save file location.

Regarding cloud saves, Heroic will let you download or force download them. After that you would just need to place them where they are expected for the game.

I use Heroic on desktop and deck and am a big fan personally.