Newer Teslas with the heat pump do great in 30deg F temps, as the graph shows, but for extreme cold like 0 and below they suffer similar to the other cars, as heat pump efficiency can no longer win at that point.
On the way home later that evening, temps were 28F. Left again almost fully topped off with estimated range of 310mi after visiting a supercharger. Arrived home with estimated 70mi of range left.
AKA, I doubt we’ll see them in cars designed in Cali anytime soon.