I drove 1800 miles in a Hydrogen Car

Three huge problems with the technology: (1) we are not producing the hydrogen via synthesis from water from electricity generated from wind/solar/nuclear (hopefully we can get molten salt thorium thermal reactors online to do it properly), (2) you need cryogenic hydrogen in order for it to have anywhere near the right volume to energy that is needed, which creates massive problems for cars that will need to be kept in storage for the long term (if you use pressurized hydrogen, then you need vastly more volume of where the fuel goes for the same amount of energy, and you quickly destroy the gas tank it is stored in as the hydrogen permeates through to escape), and (3) you need vastly more electricity expended into making and pressurizing/supercooling the hydrogen than you will get back from the hydrogen, as opposed to batteries which can give you nearly every joule that you put in!