Earlier quoted context omitted.
Storage cost is falling faster than renewables cost ever did. So in the meantime, build out renewables so that you have something other than fossil fuels to charge your storage from. Then build storage. By then it will be radically cheaper than it is now.
This, to me, sounds like a pipe dream. We can become carbon neutral with the tech we have _right now_ whereas I fail to imagine how these necessarily exponential improvements in storage capacity will happen. The _one_ thing that gives me hope for storage is maaaaybe synthetic fuels. But currently it's unproved.
Electric synthetic ammonia is mature tech. It just takes a long time to build the factories to produce the needed amount of synthesis equipment.