Disagree.
I can drive with either and having my camera on my M vs no camera on this rental Malibu I have right now is WAY better.
My camera is a ‘wide angle’ so it shows me a little bit of the sides as well. This is VERY useful when you’re sandwiched between two SUV’s in a parking lot for example.
Not to mention, mine has lines for parking. I only use my right mirror (which tilts down to show me the curb/parking lot painted line) and my camera to back into my spots. It shows me where the car will end up as I move the wheel.
Very useful. I can make a demo of this feature for you all if you want :lol