I think these motor plant closures may have more to do with the fact that no-one in their right mind is buying ICE vehicles at the moment unless they have to, due to uncertainty (or is it certainty?) about forthcoming emissions regulations...
I agree, also I am aware of several people who are seriously considering an electric car, but are still a bit nervous of being an early adopter, they are therefore waiting to see how other people get on with electric cars.
Meanwhile of course they are not buying a new petrol car.