I drove 1800 miles in a Hydrogen Car

The funny thing is that hydrogen-powered cars are actually highly inefficient compared to lithium battery-powered cars. The amount of energy lost through hydrogen production, transport and filling is crazy. It is also extremely expensive to produce and store hydrogen for standard filling stations. The fuel cell only extracts 40-60% of the energy from the hydrogen which comes from electrolysis (which is also only around 80% efficient). After all those steps the final energy efficiency is actually very low and even approaching internal combustion engine numbers. An EV lithium-ion battery is around 99% efficient when the energy is extracted. The only real benefit of a hydrogen fuel cell vehicle is that it's quick to fill-up compared to current EV charging times. Once battery technology becomes better (solid-state batteries and higher wattage charging) and we start using more renewable energy, I think hydrogen cars will become completely obsolete.