I have both birds eye and ultrasound sensors all round and I’d give up the Birds Eye first easily. And there is no way Tesla will completely replace the ultrasound distance sensing with software. Ultrasound sensors are cheap compared to making multiple cameras equally reliable for depth sensing which I imagine must require deicing and wash nozzles to work well. I need to rub my finger over the lenses of my side and rear cameras every day with rain or snow (So daily for at least half the year).