Indeed. The first Nissan Leaf had a 20 kwh battery in 2010. The latest model you can get in a 40kwh and a 60kwh variant. And you can upgrade the battery in that original one with a 40kwh one that is a drop in replacement for the original one. The next ten years are going to be interesting. Assuming nothing will change seems more foolish than most other predictions. IMHO 2x capacity improvement is pretty much a done deal. There are multiple viable paths; it's just a matter of building and scaling production for this. 4x is very likely and 8x not unimaginable. More a question of when than if. 8x is probably going to take a while.