I am in utter disbelief that I got my Steam Deck using an SNES mouse

The tool I used for it is called the Retrode2, a cartridge dumper which doubles as a 2 SNES and 2 Genesis controller hub.

With a bit of patience you can even run SNES carts on a Steam Deck https://mastodon.social/@16bitvirtual/116479936082268893

Is it cheap? Nope

Is it sensible? Absolutely not,

Was it fun? 100%