Still play ours, very underrated console. To be fair i still play my Super Nintendo, GameCube and N64 as well!
That's one reason i got the Wii U.
Once modded (easy to do only need an SD card and PC to put files on?
You can play Wii & GameCube natively and emulate all the consoles you mentioned.
Attach a big usb stick to it and load that up you have a little retro machine that can run every Nintendo game up to switch titles (excluding DS as well)
TurboGrafx, Atari (2600, 7800 Jaguar) Sega Megadrive & Master System
Some arcade only games too all run well.
It can't run Sega Saturn or Dreamcast though, which a shame, Saturn has been so hard to emulate and the Dreamcast is too much for Wii U to run well.
PS1 emulation is meh on Wii U, some games are playable a lot arnt.