I was in the Tesla store this last weekend, and the SA noted that delivery times for Model S's is down to 5 weeks (was looking at 60's). When I asked why, he said the factory is ramping up production of Model S's to begin volume testing the Model 3 production line in anticipation of the launch. Last night, with the discontinuation of the Model S 60, the options have changed a bit. Specifically: (1) Power liftgate is now standard (2) No solid roof -- only all glass + panorama as options (3) No smart air suspension Here's a theory based wholly on conjecture -- what if they removed these options so that every car that comes off the production line focuses on a feature that the Model 3's can be built with? This would enable to stress test that they can handle the volume with all different iterations, just on a different body style.