To be fair, i think it may have some use for fleet vehicles like taxis and long range buses because these are applications where being able to refill in minutes at a fuel depo you already run actually matters as compared to the stress you would put on a large battery fast charging day in day out. I also believe that Japan has a nuclear plant that is being built with the capacity to efficacy generate hydrogen directly. That being said, for personal vehicles I can’t really see the market of people who need that fast of a refil being large enough to reach the economies of scale necessary to be practical.