>I'm not sure why you are so insistent that they should be similar. I'm not insistent, I'm just asking why it's not possible or practical to swap out a hydroge

>I'm not sure why you are so insistent that they should be similar. I'm not insistent, I'm just asking why it's not possible or practical to swap out a hydrogen tank in a vehicle. I guess that's heretical. Here's a company that sells tanks. You can use it for welding among other things. There's one in just about every city. https://www.airgas.com/resources/gases101/hydrogen https://www.airgas.com/resources/gases101/hydrogen Fork lifts currently use them too. https://www.cnbc.com/2019/02/21/musk-calls-hydrogen-fuel-cells-stupid-but-tech-may-threaten-tesla.html https://www.cnbc.com/2019/02/21/musk-calls-hydrogen-fuel-cel...