Has the Mario Kart franchise outclassed the Super Mario Bros. franchise?

[Torpoleon]

@curl-6 MKWii even almost surpassed the original Super Mario Bros (and the only other Mario game to surpass MKWii in sales is MK8 DX).

I would definitely say that Mario Kart has outclassed the Super Mario games. It is significantly bigger and more important to Nintendo, with Mario Kart even being the first game shown off for Switch 2. Even on Switch 1, they released a deluxe port of Mario Kart 8 before a new Mario game. Mario Kart is easily Nintendo's most important franchise overall.