trains work as the infrastructure to charge their cells is more localized.

I don't care about how the German gov't thinks they are smarter, Its pretty obvious they were short sighted in energy generation by going with Russian LNG pipelines and not expecting them to fuck that up. So if that is your standard of smart hydrogen use cases I doubt I will be able to convince you and will just stop trying.

Rockets and Airplanes are the strongest argument for hydrogen due to high impulse energy needed and the fact of losing its weight as it burns the liquid. And to be frank even rockets have higher impulse energy fuels per weight than hydrogen (RP-1 is just nasty stuff to handle), hydrogen is just cleaner to burn.