The point is that batteries are many orders of magnitude off in terms of cost, weight, size compared to fossil fuel storage. > Electricity will be like propane

The point is that batteries are many orders of magnitude off in terms of cost, weight, size compared to fossil fuel storage. > Electricity will be like propane, soon. Is not true for any reasonable definition of "soon". Our efforts would be better spent optimizing the grid for variable load rather than trying to solve storage. Actual grid scale storage will be unsolvable for decades.