Fremont has no more room. I think it's 6 assembly lines for the S, X, and model 3 (except for batteries and motors which come from Nevada). So they are at cap

Fremont has no more room. I think it's 6 assembly lines for the S, X, and model 3 (except for batteries and motors which come from Nevada). So they are at capacity and not changing anytime soon. The model Y will use the battery and motors from the model 3 and Tesla is building a new assembly line in Nevada based on their experience building 3 assembly lines in Fremont. Given that the y shares 75% or so of the parts of the model 3, it shouldn't be nearly as hard as the first model 3 assembly line. I don't believe the model 3 shared any parts with the S and X, and obviously are targeting a much simpler and efficient production line to hit the much lower price points. So given they are producing 5k a week model 3s and have learned quite a bit in the process it doesn't seem nearly as risky to start a new line for the Ys in Fremont. Time will tell of course.