Hydrogen will never be a viable fuel and will never save the world. It leaks like hell, has a low energy density so it needs to be either highly compressed or highly refrigerated to liquify it to be even usable for something that is moving, which needs a lot of energy and induces a lot of constraints.

Basically, everywhere where electricity is a meaningful solution, hydrogen is just outclassed. Which leaves heavy industries and maybe cargo ships. The rest must either electrify, or just go.