The cost of LiDar has been falling for a while now: https://arstechnica.com/cars/2018/01/driving-around-without-a-driver-lidar-technology-explained/ https://ars

The cost of LiDar has been falling for a while now: https://arstechnica.com/cars/2018/01/driving-around-without-a-driver-lidar-technology-explained/ https://arstechnica.com/cars/2018/01/driving-around-without-... Waymo LiDAR is custom made and they cost a lot less than what is available in the market. https://arstechnica.com/cars/2017/01/googles-waymo-invests-in-lidar-technology-cuts-costs-by-90-percent/ https://arstechnica.com/cars/2017/01/googles-waymo-invests-i... I don't think it's a cost, Elon has a personal bias, or maybe he didn't account for the fact that in the not so near future LiDAR cost will go down drastically.