Rear view mirrors are not that common with commercial vehicles and are already replaced by cameras at least on the Tesla’s Cybertruck (the least of that car’s problems).

While getting rid of the rear window is kind of a surprising design decision, I don’t think it’ll spark major controversy.

it wouldnt make LEOs very happy. its almost neccesary, to have rear windows, in order to view furtive movements of occupants, and profile suspicious behavior, justify acting under probable cause, and make a traffic stop that, after a few assertions, converts into a search.