Increased mobility, due to technological advancements also made the impact.
Consider that, most people were born, lived and died pretty much in the same place, up until maybe the mid-20th Century.
Today, we don’t think much of all of living in several different places, and all the travel we now do to other places.
Possibly, but 60's cars weren't much more advance than the 50's, except for new optional items. As the parents deferred to their Boomer kids antics, the hippies and others would mostly pool their resources for an used car. I did it with friends, although was never a hippie.
The exception would be the rich who bought new cars for their spoiled over-indulged kids, mostly on the way to a college where they took their "anything goes" beliefs with them that started the dumbing down of academia. Those who couldn't get a car, hitch-hiked. That was big in California. Are you talking about other means like buses or rail or what?