The last time I tried emulation on a desktop PC, whether it was Windows or Linux, I had to install each emulator separately. It was a bit of a mess.
On my Steam Deck, Emudeck made it stupid easy. Retroarch wasn’t terrible, but was a bit more irritating and buggy for me to get working. Either way, it had a bunch of emulators all in one spot so I didn’t have to go hunting for a ton of them. Are there solutions like this for Linux as well now? What about for Windows or something like a RetroPIE?
If you can use a spare box or at least a boot device, there are systems like https://batocera.org/ that will box a lot of stuff together. Obviously independent emulators are all distributed independently though many of them do multiple systems.