I'm not really following. You said, "I don’t think we can scale up storage enough at any reasonable cost." We checked the math. The math said that even with pessimistic numbers, that assume no cost improvement and that everything deprecates as fast as the batteries, the amount of storage needed was readily affordable. You agree that there's a reasonable chance the price could go down, and agree that parts other than the battery chemistry do indeed last much longer.

Isn't that the whole debate? What are we arguing about at this point?