I remember a interview with Musk where he was talking about the problems with the automated assembly line. He specifically mentioned that it was difficult for the robots to see a "dangling cable" that had to be plugged into a socket. It was never at the same location and it was always moving (swinging) so it was almost impossible to grasp. I'm guessing that this might be possible now. Hmmmm... maybe the 'Y' line will be more robots.
