My personal opinion, it was a ruse. HD radar will be released in January. 2023 cars (non-USS) already have it or will be upgraded with it upon release. The HD radar will provide the proximity feedback.
Re: Prematurely Disabled Sensors. Seems like they should’ve kept the sensors working until the new radars were installed. There is now basically no proximity with just cameras, especially building corners & parked cars. Also, last night on my local 2-lane street, the cameras wouldn’t visualize parked cars, only trash cans put out for pickup, between them. Very strange!
Something similar has been done with MB new vehicle where front vision cameras is keeping part of picture and proper calibration values will enable to see how close you are getting to the bumper even if it is in blind-spot of bumper...this is my assumption how they going to handle axed proximity sensors.