Uhhhh, tell that to the Grand Am Rolex GT champions.
I really liked the idea of the Wankel engine. Had a friend who had a Mazda.
But the seals on the lobes of the rotor turned out to be very weak points.
I’m an engineer who was all for the gas turbine engine. Efficiency got that one as far as automobile usage, even with all sorts of economizers trying to recover waste heat.