Sure, but how useful is the energy density in practice? 1. Very soon all new cars will be electric anyway (because that is better for other reasons) 2. I’m assuming range will not be an issue, almost all private driving is very local, so most cars don’t benefit from long range, as long as it’s easy to get long range vehicles when you need them. And of course trucks etc will need to be long range. 3. Driving a truckload of energy is cool but how useful is it? We can already deliver more energy than that instantly through the grid, and most populated places on earth are on the grid now so it seems like a niche use case.