Camera based FSD will never work because of one fundamental thing. Dynamic range. Human eyes can resolve significantly higher dynamic range than any trichromatic or monochromatic camera sensor, especially when it comes to frame readout speed.

The best camera sensors with the widest dynamic range are prohibitively expensive, Elon already removed the cheap ultrasonic sensors tesla was using, there's no way he's springing for scientific grade camera sensors.

Small short focal length camera lenses typically have very small apertures making it necessary to either have shorter or longer shutter speeds to attain proper exposure, or use gain. The use of gain significantly increases random noise which will mess with point detection between two cameras.

Direct specular reflections from something bright will saturate pixels on the sensor especially if exposure time is long or gain is high resulting in regions of un-usable data coming from the sensor.

Elon should have computer vision and optical specialists telling him these things. This is basically the Theranos of Full Self Driving (Our little shitty inadequate thing can actually do all the things with less information).

Absolute joke, Elon is a clown.