I ordered a white SR+ on 3/26. Last weekend my window shifted from May 10-22 to May 22-June 11. Hasn’t moved since. My SA just said that I’ll get an email when I have a VIN. The shifting of the estimated delivery dates has been extremely frustrating, especially when people who ordered around the date are getting VINs. I know the wait will be worth it though.
VINs are assigned as the cars are built, and they can't all be built at the same time, so some variability is to be expected. They could be running batches based on interior or exterior colour, or single vs. dual motor.