Personally I think most of that stuff is more a marketing exercise. Blind spot alert? Lane departure warning?
Air bags have absolutely no effect unless you crash in a certain way, same for crumple zones. The real advancements were abs as it works every time you brake heavily, preventing a lot of accidents.
Not to mention all that electronic gear adds shed loads of weight. Meaning you need bigger and better everything to compensate for it. Better tyres etc are really only compensating for the extra load and inertial force created by it.
In a way, pretty much most of this marketing safety stuff just ends up creating more problems than they solve in my opinion.