The Wii U thing really chaps my ass. I bought one a couple years ago to mod, and it's easily become my favorite console (at least for emulating). What I would do is make a home console that was just a better version of the WiiU, that uses a Switch as a gamepad. Not that you would need to have a Switch to play but that could provide backwards compatibility. You invite your friend over to play a game, they bring their switch 2 (just the portable gamepad) and they connect it to your home console (a Switch 2 base console) that outputs 4k60, and your portable gamepads become your second screens/controllers in whatever multiplayer game you are playing. I really just think they fucked up so hard on the WiiU and they should try it again, but better, and don't call it a Switch.