[xorcist]

In the context of hydrogen storage, was it not obvious what "ammonia" refers to?

We do not need an alternative to the Haber process, the idea is to use electrolysis to produce hydrogen from sea water. There is room for improvement in the process but the technology is old and well understood.

There are other ways to store hydrogen, and it's far from certain ammonia will win out in the marketplace, but there are no serious alternatives to hydrogen as an energy carrier in the long term for this application. Everything else is just impractical and even more expensive.

Just like flight fuel, it has seen little change because it is quite heavily subsidized in its current form. The day we collectively stop and start taxing it like other fuels, the market will change overnight.