>>713484696
The Deck can comfortably run Gamecube, PS2, and below. The hard part is getting all the emulators and roms on there, then organizing all of that shit, without a mouse and keyboard. Spoilers: It's going to fucking suck setting everything up, but the actual act of emulating on the Deck is good.
And don't use EmuDeck, that shit is fucking ass to work with and they now lock features behind patreon. RetroDeck is a lot better and is actually made for the Steam Deck rather than just supporting it.