Given how many people in California go to Tahoe and Mammoth for a weekend, I think cold weather driving is a must. That would stop me from buying one.
But, as for cold, Tesla apparently have lots of Scandinavian customers who live in very cold places and they seem to do okay. I have no idea how to say "My car died in the cold" in any of the Scandinavian languages, so I can't search for reviews.