You all really took this question and ran with it in a way that totally avoids answering the practical question at the core — how good are these batteries going

You all really took this question and ran with it in a way that totally avoids answering the practical question at the core — how good are these batteries going to get over the next 20 years? The answer is really, really good. Fast charging, long rang, 1 million mile lifespans. Add on top of that the ability to connect into a smart grid and earn money by buying energy off-peak and selling on-peak, and the ability to double as an emergency generator for your home.