I don't buy this.

Is it the same reason other car manufacturers continue to use tiny shitty displays? I remember hearing similar arguments back then about that - the displays were 'hardened for cars' or something.

The simpler explanation is the other manufacturers can't adapt.

Radar was removed because the computer vision got to the point where the radar data was introducing noise and errors into the system - the quality of the sensor data went up after removing it. Karpathy's latest talk goes into this.