>>720168317
Vita and 3DS aren't really worth using for emulation, just their adjacent predecessors via the homebrew methods and even that isn't perfect (Adrenaline apparently isn't perfect for everything and TwilightDS simply doesn't support some games properly). Any of these modern handheld PCs in the mainline channels can handle PS2 and Gamecube without batting an eye, besides maybe certain games (looking at you Star Wars Rebel Squadron), and with the right picks and emulator, yes, even the Steam Deck can technically handle some Switch 1 games thanks to later optimizations. Any of the chink third party handhelds going around are a complete and utter crapshoot that at best can handle up to PS1/N64/Saturn with virtually no issues, but PS2, GC and PSP are all over the place with some ready for the workload and others not so much.
Value for dollar, Steam Deck will handle most emulation needs for that bulk. If for an emulation machine you're looking for something a bit more palatable for the hands, you're really gonna have to dig in those smaller options, Retro Game Corps is one channel that covers a ton of the things.