Probably file this one under a 'dumb' question, but why aren't their more car brands in F1?
For instance -
BMW
Bugatti
even American brands like
Ford
Chevy
It just seems like F1 is really the focus of Mercedes, Ferrari, Honda, and Renault. (Looking at Engines)
Hell, it may seem weird, but I wonder if Tesla would ever get into this arena. No full which would mean lighter cars, and they have already proven to be capable of making some crazy fast vehicles.