I still rather have good ol radar as a fallback if cameras and their AI model don't work for some reason. They are still work in progress, and rely on trained models to recognize objects, while if a radar sees something, it is because there is something actually there and not a guess. I don't buy the story that too much sensors is bad. Planes rely on multiple different sensors plus backups for redundancy to fly safely, self-driving cars with vastly superior tech should be able to do the same.