Mario Kart 8 hits 8 million

[VAMatt]

Keybladewielder said:
Incredible. MK8 must have one of the best attach rates of all time.

Having its own Mario Kart will be important for the success of the Switch. I wonder when will we get Mario Kart 9.

According to Wikipedia, Karts are released about every 3 years.  MK8 was released in May of 2014.  So....