> So, when would hydrogen make sense?

All production issues aside, aviation makes sense to me. Planes are only filling at known stops, the weight is superior to our best batteries, and the transition from fossil fuel to hydrogen jets should be easy.

As for as long haul trucks, I can kinda see it, maybe, still a lot of storage, production, efficiency issues. Weight isn’t nearly the same concern as it is for aviation.

For cars, yea, I don’t see it.