You must have a magical car that has absolutely no blind spots! Which one is it? I'd like to consider purchasing one as my next car.
My current car will give warnings if it sees cross traffic approaching when in reverse. It has warned me a few times when someone is driving way too quickly through a parking lot and my view has been blocked by parked cars.
Things like this are REALLY useful. You just don't realize how useful they are because you haven't used the technology yet.