> Hydrogen energy density is around 39,000 Wh/kg

Lithium's energy density is 11,600 Wh/kg.

> In reality, we're nearly at the point where hydrogen is a solved problem, but batteries will be a very long ways away from being a car for everyone

I can buy a battery powered vehicle today. Seriously it's 5pm on a Sunday. However the dealer is open till 7pm and they have a couple of dozen Chevy Bolts on the lot.