The majority of comments surrounding stereo-camera/lidar questions have a ridiculously simplified idea of the problem. It's obviously the case that 'more sensor good, less sensor bad'. This is frankenstein's monster level technical analysis. Why don't the majority of large-brained animals have many eyes, and many different antannea appendages processing an array of diverse sensory input? You don't just automatically gain by adding lots of sensors. The signals have to be fused together and reliably cooperate and come to agreement in real time for any decision. Any sensor is only providing raw crude data. The majority of the work involved is done by processing this crude data and inferring a much more sophisticated approximation of the real environment from prior knowledge, hence using neural nets with pre-trained data. It is a good debate whether the approximation can be done better by adding more sensor input and diverting R&D & processing resources towards fusion as opposed to improving the results that can be obtained from stereo image sensor. It's not obvious to anyone. And nature seems to inform us that most large brain animals evolve to rely heavily on two eyes instead of 16 eyes + lasers. This is an interesting discussion, but the issue isn't 'tesla could just bolt a Lidar box to the roof and magic, but they want to scam you out of a few extra bucks'. That is a moronic idea.