Impossible to predict because we just dont know how fast the technology will develop. Let’s suppose energy density of batteries doubles over ten years. So you have a car that is far simpler to build with a battery half the size that could outlive the car. It’s a big investment to mass produce cars but with the simpler designs you could have many manufacturers supplying niche markets. Something like a Smart car with a 50 mile range could be built very cheaply outside of the mainstream. Suddenly the chassis designs of the big manufacturers is all wrong because the battery sizes and weights have halved.