We try to minimize our car usage - we have one car for our family of 6; I ride an electric scooter to work etc. Not having a car at all though would be basically impossible unless we decided to cut out the kids sport and traveling to visit family.
We aren't going to eliminate cars in my lifetime (hopefully I've got a good 40 years or so left) but if we can get more households going car-light that's still significant progress.