For the OS, with the Android ones there are usually very few to no alternative options, mostly batocera (but you will have to wait a bit until a version for this one gets made). The CubeXX should handle up to ps1/n64, but you would need a device like this for ps2/gamecube. I personally don’t think it’s worth it as I mainly want to play N64/SNES/Arcade on a device like this, but I do have a steam deck which does up to switch so maybe you decide differently.
For the OS, with the Android ones there are usually very few to no alternative options, mostly batocera (but you will have to wait a bit until a version for this one gets made). The CubeXX should handle up to ps1/n64, but you would need a device like this for ps2/gamecube. I personally don’t think it’s worth it as I mainly want to play N64/SNES/Arcade on a device like this, but I do have a steam deck which does up to switch so maybe you decide differently.