But yea, as for the rest of the "safety mechanisms" the only modern change that I can think of that's not easy to retrofit but is a huge safety boost is blind spot detection. As someone that drives older (and smaller) cars, being able to see the blind spot detection light on other cars' mirrors is always a bit of a relief that their car will notify them if they try to change lanes.
I think there are important dimensions of safety that go unmeasured. You have much less road awareness in new cars.
Survivability is great and all, but not at the expense of children and pets becoming invisible.
All the focus on survivability provided another incentive for makers to put ever larger pieces of steel on the road. I disagree that new cars are safer.
I have experienced driver aids glitching, and i want none of it. Anything that can take control of the car needs to be bulletproof, and it isn't.