Ain’t got those amazing Nintendo games though. Glhf finding a Mario Cart replacement that is actually as good.

This is not entirely true. Depending on the stance of the person regarding piracy. You can definitely play Mario Kart on the Steam Deck. Emulations for PS1 PS2, Switch 1 exist (there are more but these I know on the top of my head).

The Steam Deck can play nearly all Switch 1 titles through emulation. Yes, developers were taken down but the emulators do still work perfectly fine (I’m saying this as Steam Deck owner and using Emulators myself).