I drove 1800 miles in a Hydrogen Car

This concept of proton exchange is in many ways the same as how mitochondria work in living cells. It is very efficient providing there is enough oxygen. Which might be a problem in some areas. But if i understand it correctly, the rare metals in the hydrogen car have a better longevity than standard electric cars.
The batteries use rare metals in an unsustainable way and even putting the environmental impact aside, battery demand is outpacing our capacity to mine the raw materials to make them. And some estimates give us a maximum of 25 years before our resources are completely depleted.
As for hydrogen, you can just produce it by hydrolysis, so as long as there is water, there will be fuel !
Plus, maybe water waste treatment could shift into hydrogen production, and be a little more compelling for us to invest in....