at least cold weather drains battery, not sure how it affects the health in general but i dont think it does it any good. The people who have ev are most likely those who can also afford heated and closed space for their car. At least i have seen many teslas all around so it would make sense if there are even more evs because tesla is only car i can definitely tell is ev.

I wish evs had somekind of "emergency" battery that would charge the main battery if it gets too low so it would protect it from getting too empty.