yea i really like playing the portable games on bigger screens. i think its because as i've gotten older (aka bigger) my fingers go numb when i try to play something like a DS or GBA. Brick GBs i dont have an issue with and the switch lite i have has grips in the controller that help but eventually they will if i go a while on it.
edit:
i had a random thought and found a thing to "back up saves" over usb for DS games and i figured i'd try it on the wii u to see what happens. either way if it doesn't work i'd want something to rip my own games any way to play on the system