The Wii was Nintendo's best-selling home console of all time, so of course its successor launched with impossibly high expectations. And yes, the Wii U was an abject failure, despite having a number of excellent first-party Nintendo games. Don't worry, this isn't some long overdue post-mortem of the Wii U. Rather, it's a look at why the Switch is so insanely successful by comparison. Could it all come down to marketing?