Cars last longer and run better. Better air conditioning. In some cars it works, and fast, and there's no more freon to destroy the ozone layer. There was a time when you had to stop the car and wipe the rear windshield if you wanted to see behind you. There also was a time when FM was optional, then came 8-tracks, then cassettes.
Manufacturers are finally capable of putting decent sound systems into the cars they build.
More comfortable seats. Mostly, you no longer see many guardrails with a blunt end facing traffic. The reflectors in the middle of the road make it easy to see the center line and, in warm states, easy to tell when you are crossing it. A totally logical invention. In the somewhat old days copies were messy, smelly and expensive.