As I understand it, grid batteries are now cheap enough, but there just aren't enough of them yet. We don't have the industry to produce batteries at that scale

As I understand it, grid batteries are now cheap enough, but there just aren't enough of them yet. We don't have the industry to produce batteries at that scale. At least not, yet! As more grid scale batteries come online and demand rises we should see some impressive production numbers soon. However in the meantime I think we'll see some odd results as older infrastructure decays and no one wants to invest in fossil fuel plants that will be obsolete in less than 40 years.