Yes northerner checking in here. Yes in the winter at sub zero temps your cars battery looses half of its starting crank amps. Half just from the low temps.

Makes complete sense that an EV would have much worse performance in winter conditions. Further longevity of such vehicle would likely be much less than one found it warmer temps.

We still have a ways to go to solve EV issues for mass adoption… however am optimistic that we are on the right path.