SpaceX rockets don't have the most "advanced" engines, but they sure are cost-effective. Tesla's done some pretty good things with 18650 cells and cars, and now

SpaceX rockets don't have the most "advanced" engines, but they sure are cost-effective. Tesla's done some pretty good things with 18650 cells and cars, and now they're hitting some serious volume. I'm surprised that that cell works for utility-scale deployments, but...