I drove 1800 miles in a Hydrogen Car

Chemical Engineer plus MBA Finance here. Yes, a FCEV works. The problem is that hydrogen, whether made from reforming methane (natural gas) or electrolysis of water, is inefficient and ridiculously expensive. Think of it as how much energy gets to the wheels. BEV is 85-90% and FCEV is 30%. Just Google "the hydrogen economy" and read some technical papers., not Toyota or petrochemical ads. Toyota has stubbornly gone down the wrong path. My Tesla runs for < 1 cent per mile from the solar on my roof. The grid is already in place for cheap nighttime charging. When we go on long road trips we use the plentiful Tesla Supercharger network. FCEVs are dead. It's not the physics of FCEVs this is a problem. It's the economics of hydrogen that is so bad.