I drove 1800 miles in a Hydrogen Car

If the hydrogen is coming from Methan (grey hydrogen) the „progress“ is none. Only if the hydrogen is coming from electrolysis from green electricity (solar, wind) when it can’t be fully used anyways (peak hours), this makes sense. For me the biggest advantage of H2 cars is that you don‘t have to carry around a large and heavy battery (which is also inefficient!) and can fuel up the car within minutes (not hours). That is: if there is a (working) fueling station around. Unfortunately in Europe these are very scarce, which is why hydrogen cars are not really a viable alternative here (even though the technology would make great sense for lorries and busses). And the Toyota Mirai is actually the only decent FCEV (apart from maybe the Hyundai Nexo).