I don't know. Seems like a lot of folks pissing in the wind have won the ARRC the last 10 years, while a lot of Miatas have not.

I get its a great car, have driven a few and have been on track with a few of the best.

Only car to build? Clearly not. I would even grant you that it might have a slight advantage over others, but nothing that excellent setup and driving has not been able to overcome.