Would you still buy a Nintendo Wii with Gamecube backwards compatibility so you can play also the Wii games that supports the use of a Gamecube controller?For me, it's the GameCube.
The Wii was good, but it marked the beginning of what would become Nintendo's modus operandi going forward. All but completely rejecting third party developers, releasing a console with an innovative feature and a bunch of very good games and then getting lazy and basically resting on it until they've declined hard enough that they have to actually try again.