My car has a camera on the sides that shows the lane where the speedometer/tachometer are when I turn on a signal. In addition to the mirrors, lights, audible alerts, etc. All very helpful.

I once got into a wreck, in the leftmost/passing lane on the interstate, because the asshat in front of me slammed on his brakes at the exact moment that I was checking my blind spot to move over. I’dve much appreciated being able to keep my eyes forward.