I think that may have to do with population and preferences. A lot of people in California (14% of US population) and EVs are huge here. Yesterday, I saw at least 20 Model 3s driving around my town of 50,000 and probably 10 Model S and X. I went to the grocery store and there were 4 or 5 Model S or X in the parking lot, and strangely, no Model 3s.