I'm on 8.5, and the reverse camera issue has been noticeable. It's usually on within a few seconds, but by then I'm already backed out of my parking space. Learning to trust the camera took a bit of time, but now I'm too used to it to go back to the old way of actually turning and looking for myself.
This was never an issue in my 1971 Plymouth Valiant 4 door, that car had the aerodynamics and general shape of a large shoe box stacked on top of an even bigger shoe box, but it did have a lot of glass space and pretty good visibility in all directions. Some things, the old cars did better.