> It's wild that after a hundred years there is still exponential progress in the power output of cars.

We hit a wall there for a while. Cars were actually becoming less powerful and slower on average for a couple of decades as governments tightened emissions and safety requirements. It took Tesla to blow the walls off EV production and consumer acceptance. It's a good reminder that progress doesn't happen in a straight line.

I was thinking more wrt. the top end, which did stall out for 30 years from WWII but has otherwise been on fairly smooth exponentials since the beginning.