Those are only situationally useful. They tend to be too dim and blurry, and if you’re wearing polarized sunglasses they can be totally black. Focusing on them long enough to make out what they’re displaying causes tunnel vision - you can’t really shift your focus from looking around out the windows and back to looking at the screen fast enough.
Back-up cameras are great for measuring the last couple inches of parking.
I believe that all cars sold in the US since 2016 have been required to have back-up cameras.
Those are only situationally useful. They tend to be too dim and blurry, and if you’re wearing polarized sunglasses they can be totally black. Focusing on them long enough to make out what they’re displaying causes tunnel vision - you can’t really shift your focus from looking around out the windows and back to looking at the screen fast enough.
Back-up cameras are great for measuring the last couple inches of parking.