I'll bite on the air resistance thing.
IMHO this is one of the best things about Elon, and one of the reasons I stay long TSLA. Its a different mindset.
If you look at the speed of robots, and ask 'why cant they go a bit quicker', then you are prompting for solutions that enable you to go 2%, 5%, 10% quicker. This is mediocrity.
If you look at the actual hard physical limits, and then work backwards, then you fundamentally change the expectations, but also very quickly find out what future roadblocks are. You avoid local maxima. (see also geofenced robotaxis).
Exaggerated example:
If you want to go high, and you ask people how to make the trampoline bigger, you get a bigger trampoline. If you say 'screw trampolines, what is preventing us getting escape velocity from earths gravity? Then (after a lot of work) you end up scrapping the trampoline factory and start building rockets.
Tesla/SpaceX/Neuralink/Boring are all asking if we need rockets, while the competition is tweaking their trampolines. Its why Ford lose $47k on every EV. They are wondering if they can make a handful more. Elons thinking in millions of units per model.