> Toyota (and others) have been touting fuel cells for well over a decade.

The cost of fuel cells has decreased to 5% of what it was then, and at least three manufacturers are coming out with limited production fuel cells cars. Just because it took 50 years to get ready doesn't mean it isn't ready.

Musk's point is basically that the energy density of fuel cells is worse than batteries. That's true, but they can be refueled instead of mechanically swapped. He says the current total cost of the system is higher than batteries. That's true, but Toyota is halving the cost every 5 years as they ramp up production, where battery cost is falling maybe 10% in that time.