Comment by bell-cot

> The limiting factor is that natural gas is very cheap and cracking it to ...

Another, or perhaps related, limiting factor is just how difficult hydrogen is to handle safely - compared to natural gas, batteries, or other alternatives - https://en.wikipedia.org/wiki/Hydrogen_safety. And it does not take many surprise explosions & fires to give a technology a bad rep. Especially when people feel there are obviously-safer alternatives.