However, it is a critical large-scale industrial input, a replacement industrial input for several additional large industries, and an excellent large-scale stationary energy store.
I mean, it seems like it should be but
* Hydrogen really likes to leak.
* Hydrogen breaks down the container holding it over time.
* Hydrogen is very low density. This means you need either a very large container or very high pressure. Combined with 1 and 2 this is going to be expensive.
I'm really asking the question. I would love to know the full cost difference with current tech vs other options.
Yes, but the rate of leakage is tiny enough that for any reasonable sized tank it's going to be years till it's all leaked away.
The real risk is the leakage causing explosions if you ever put a tank in a confined space.