I just don't think musk is pulling shit out of his ass. He usually comes very close to what he claims
Battery swaps, snake charger, 600 mile range, autonomous cross country travel, full self driving, tesla solar, NY-Phil-Balt-DC Hyperloop, 29 minute rocket flights to London at the price of economy air travel, drive-in roller skate restaraunts at super chargers, a candy company, low cost housing from Boring company byproducts, fixing Flint's water, a cave diving mini-submarine, electric skate pods for Dodger Stadium, One Hour bodyshops, no-replacement brake pads, $250k appreciating robotaxis, jobs on Mars, SpaceX ventilators, underground car tunnel networks with an elevator into your garage...
He says so much wild shit that a high pressure gas jet system that's going to put out the 2+ million watts per second to get a 2 second car to 1 second, and can jump with a controlled landing that doesn't explode the suspension of a car made by a company with a history of suspension failures, isn't as far fetched as fixing Flint's water, but it's out there.