Hydrogen for mass- or space-constrained mobility (eg bikes, automobile, aircraft) faces all the known problems with storing it inside inconvenient shapes and contending with the losses from liquification. Real Engineering has a video on this aspect (Nebula and YouTube) when compared to simply using battery-electric storage.
However, I think hydrogen could be very useful for train locomotives -- which historically had "tenders" that stored the fuel behind the prime mover -- since weight is less of a problem on traction railways. As well as any stationary applications, such as utility-scale hydrogen to time-shift electricity supply, where there may be scales-of-efficiencies to realize. Today's utility-scale battery farms are not exactly gaining any scales-of-efficiency to speak of, because they're just adding more battery cells to the grid.
A singular, massive hydrogen storage tank would be a sphere, benefitting from a favorable volume to surface area ratio, among other possibilities. And such a sphere would make better use of land by growing in height, whereas multi-storey battery farms would be fire hazards. But these are just cursory conjectures.