I agree 100% with Chip's view. One tip I received years ago in my first aerobatic lesson was to carry a very small hammer to break the canopy open in case of ending upside down. Lots of things can happen upside down in an airplane or car which could be fire or smoke and you become trapped. In this case I would rather have no canopy on these cars...but I don't race. I fly. It's also really easy to be an arm chair quarterback. IMHO.