The new radar systems in the front of the car that slam the brakes if you might hit something are lifesaving for both occupant and pedestrian.

The little indicators if someone in your blind spot is also a HUGE safety increase for drivers and bikers/scooters/etc.

Those should be as standard as seatbelts an airbags in 2020.

I’ll take the other side and say some of the newer (literal) bells and whistles are more a distraction than a life saver. Properly adjusted mirrors should have no blind spots - I don’t need lights on the mirrors constantly flashing on the highway. My last rental would beep whenever it thought I was drifting out of my lane but suffered from so many false positives it was infuriating.

I’d add ABS (also readily avail though not standard 20 years ago) and side airbags (very uncommon 20 years ago) to the list.

Most people are pretty poorly trained and now, often distracted, drivers.