Comment by cyberax

We might have shaven off ~10 years from the current timeline.

Batteries are only a part of the equation. Practical EVs were enabled not just by Li-ion batteries but by IGBTs. And semiconductor development moved about as fast as possible.

And then there's a gulf between lead-acid batteries and Li-ions. I think only NiMH batteries would have been a reasonable midpoint, and even they would have been impractical for full EVs.