7.5 million, maybe less if the guy's claim from above is true, is still phenomenal for a game whose concept was received which such strong skepticism. At the same time, it feels a tad low for a very good Mario game and more specifically for a great game that regularly sold for low prices. For example, I bought it in Amazon for 190 pesos, which is less than 10 dollars, though its regular price ranged from 25 to 30, I won't lie. Still, that puts it among the best value propositions for a retail Switch game, especially the exclusive ones. Either way, don't get me wrong, a lot of people played it and that's a good thing.
My bet with The_Liquid_Laser: I think the Switch won't surpass the PS2 as the best selling system of all time. If it does, I'll play a game of a list that The_Liquid_Laser will provide, I will have to play it for 50 hours or complete it, whatever comes first.