Waymo took a year and a half to get 300 robotaxis on the road in Austin. Tesla just did it in 5 weeks. The whole difference is a car factory in Texas. Every Waymo starts out as somebody else's car. A Jaguar I-Pace gets built in Austria, shipped across the ocean, then hand-fitted with lidar, radar, and computers that analysts peg at over $100,000 per vehicle. After 15 years of doing it that way, Waymo's entire worldwide fleet is around 4,000 cars. The Cybercab just rolls off a line at Giga…