It probably won't reach Switch's sales given the price, shitty economy, and lack of novelty, but I can't imagine it will do as bad as the Wii U. The Wii U had some unique problems with its fucked up marketing, there was more direct competition from PlayStation and Xbox at the time, and Nintendo consoomerism wasn't as big at the time. The Switch feels like it turned a lot of people into the vidya version of Disney adults who will buy up anything Nintendo because they consider it a part of their identity. At worst, I predict the Switch 2 will sell a lot at first then taper off into uncomfortably mediocre sales until a game that really hypes people is released (Mario Kart isn't that. It sells a lot, but I think it's a more casual seller that people will buy once they have a console, rather than buy a console just to play it).