[amorphous]

Too many problems with using hydrogen as a fuel to make it practical - especially in a consumer market.

The most successful use of hydrogen fuel in history, as far as I know, would be when used to power the Space Shuttle's three main engines.

IIRC, heavy lift rocket motors are now are being designed to burn liquid methane. But carbon atoms in the molecule gums up fuel cells.

[rktman]

And we used a lot of it.😁