Mario 64 Proves That Fans Are Wrong Saying "It's Fine For A Launch Title"

[Goatseye]

"The development of Super Mario 64 took less than two years, but it was reported that producer and director Shigeru Miyamoto had conceived of a 3D Mario game concept over five years before, while working on Star Fox."

http://en.wikipedia.org/wiki/Super_mario_64#Concept

Plus, Mario is not as detail determinant game like Forza that every car needs to be true to its real life self.