It's easy to argue that LIDAR is expensive and unnecessary, but radar has been a standard for luxury cruise control for decades so it's got a variety of OEM suppliers. Thus Tesla's lack of radar because of the CEO's ego is damnable. The problem with camera-only is fog. My human eyes don't penetrate fog. Radar does. Proving that camera-only is possible is stupid and ego driven and doesn't come from a place of merit and science and technology.