I feel like it's unlikely for pack prices to continue to drop 21%/year. Tesla+Panasonic have gotten pretty good at reducing pack costs, and while Tesla's in-hou

I feel like it's unlikely for pack prices to continue to drop 21%/year. Tesla+Panasonic have gotten pretty good at reducing pack costs, and while Tesla's in-house cells could reduce costs significantly, IIRC, a 21%/year reduction in costs for a decade would be significantly less than the materials cost.