We regularly have folks here on FR advocating for hydrogen-powered cars. Same issue there, it’s a really small molecule (atom in the case of helium), and it really wants to leak.
Great point FreedomPoster. I have my doubts about Hydrogen cars as well. It seems to be a fantastic concept, and can work in a controlled environment, but what happens when you have hundreds, thousands, and perhaps millions on the road? There are always unforeseen issues. For instance, EV’s sound great until you do the math on mass consumption. Aside from the usual difficulties, thieves are stealing the charging cords for the copper. Can you imagine the feeling of driving 200 miles and needing a charge, and you pull up to a station and there are no charging cables available? So, they will have to be designed to carry your own charging cable, which will be expensive, etc.