Hydrogen trades volumetric energy density for gravimetric energy density. It is too difficult to build a car that can safely hold a reasonable amount of hydrogen without making it bigger or sacrificing cargo space, and building a distribution network on the same scale as gasoline is a problem we still have no idea how to solve.

I think hydrogen will be much more viable in shipping, where these problems are much less pronounced. Big trucks and container ships are less concerned with volume (weight is more important). And they move along common and predictable routes meaning you don’t need quite so many hydrogen gas stations. You distribution just needs to cover truck stops and ports.