Like I mentioned in an answer to a sibling comment of yours, I didn't mean to say that we're at the end of the road for battery development today. Just that we

Like I mentioned in an answer to a sibling comment of yours, I didn't mean to say that we're at the end of the road for battery development today. Just that we cannot expect decades of exponential improvement like we have seen with microchips. I don't think an order of magnitude improvement in price/kWh is out of the question (in terms of kWh/kg it probably is, though?). But two orders of magnitude? Color me skeptical. Wrt cars, I think batteries are not too far from being viable to replace most uses in cars, city buses etc. And that will be a massive, and welcome change, in our society. For long-range ships, planes etc. I don't see batteries as viable. My guess would be, for a future decarbonized society, synthetic hydrocarbons for planes and ships; some ships might use hydrogen or nuclear reactors.