I don't buy that at all...nascar teams, well well funded ones anyway, love new tech, they are always looking for new things to exploit and advance in. But like i said, well funded teams, what happens to all of the budget teams, and the busch and truck series, none of those guys could afford to change out their hundreds of engines for completly new ones. I just dont see any possible advantage to fi at this time, and neither does nascar...i guess that would be the main reason not to switch but thats just my irrational nascar fan opinion