Are you sure the N64 and SNES Mario Karts weren't just less busy due to hardware constraints? N64 had limited polygon count compared with modern gaming systems.
Also, the Wii came out in what, 2006? It's definitely a millennial gaming system.
Also, the Wii came out in what, 2006? It's definitely a millennial gaming system.
In fact I can't think of another product that's more quintessentially millennial than the Wii.
Antidepressants come to mind