our Mazda has headlights that turn with the steering wheel

That sounds pretty cool, but also horrible if they fail as you seem worried about, when they are pointing to the side. I am partial to the little extra lights that shine to the side when turning sharply. If they should fail they will not impact the vision ahead.

automatic folding mirrors

Yeah, we disable ours in the winter because of issues when snow and ice builds up and they automatically try to fold in or out and get stuck. Disabling them in the winter time works well. I just use them manually when it is safe to do so. Quite nice in tight parking garages.

I sometimes notice a slight delay in releasing the brakes when I take my foot off the pedal.

An Audi Etron in Norway just had a complete failure of the breaking functionality. https://dinside.dagbladet.no/motor/skrekkopplevelse-vi-hadde-griseflaks/80583545 It is in Norwegian but you can right click and translate to english ( at least in Edge ). There is still a mechanical connection to the breaks most likely, but it is hard to break hard enough when the car weighs 2.5 Tons.

And that crash at the Peace Bridge

Have not seen that one. That is terrible. There should be complete separation between the software that controls the drivetrain, breaks etc in a modern car, and the part that plays spotify. In my car atleast. I can reboot the screen that shows the map, spotify, and speedometer while driving and the essential car functionality such as breaking, gears and blinking still works with no issue.