Well, seeing as my car will be delivered to Boise, ID, I am GUESSING that that means still Fremont? I personally would love the new castings approach to be in my car. 4680 too, but I realize that with a June delivery date estimated at this time, that is not likely, unless I try to defer. It will be interesting how soon Fremont also gets the new processes up on line. (EDIT: I did some googling around, and it seems Fremont already has a Giga Press?) It seems odd to me, and like it would problematic for Tesla, to have two different manufacturing processes going on for very long. I am also cognizant of the perils of receiving a car off a brand new production line that has not had the kinks worked out yet. Again, hoping June gives some time for those things to occur, and so am fine with my current estimate.
In any case, all I can do is wait and see, and try not to get too excited either way about the internet and YouTube rumor mills.