Well no one told BMW about this hydrogen being dead thing...
https://lagradaonline.com/en/bmw-hydrogen-engines/
I think it's good we are looking into all options, technology advancements tend to cross fertilize new ideas. But I don't know if I agree that this is a worthwhile application for hydrogen. By the time these things are really nailed, I suspect recharging times will have dropped so much as to make the time gained not all that much better.