I think there was a point in time when hydrogen looked like it might be a realistic option for personal cars. I think that time has now passed. Electricity is just so much more ubiquitous, which makes battery electric cars much much more attractive.
However, I think hydrogen makes a lot of sense for fleets of vehicles that need to go long distances between fixed depots where infrastructure can be built. I think hydrogen buses and trucks are a natural choice, because you can build fuelling stations at their depots, and then you don't have to lug a battery around. Whether that ends up being more cost effective than battery electric, I don't know.
However, I think hydrogen makes a lot of sense for fleets of vehicles that need to go long distances between fixed depots where infrastructure can be built. I think hydrogen buses and trucks are a natural choice, because you can build fuelling stations at their depots, and then you don't have to lug a battery around. Whether that ends up being more cost effective than battery electric, I don't know.