According to this article (https://eengenious.com/how-to-build-an-electric-car/) the most important technology in an electric car is the power management technology, not the battery and not the motor.
You can’t go very far with a small battery, or climb hills with a weak motor.
I think the point of the article is that efficient and safe energy conversion – driven by semiconductor switching and power handling – is what makes it all work
If you are talking about current generation Li-ion batteries, perhaps yes. But we’re on the verge of productizing several new battery chemistries.