Cars are by now a hard to reverse environmental and urban planning disaster across the world. We are stuck with them. As a mode of transport it has grown uncontrollably at the expense of all others (except the airplane) and practically everything has been shaped to accomodate it.
Reversing that development, limiting car traffic to where its really needed is like trying to perform a complete heart and arteries transplant on a living person. Even if there was a will (which there is not) it is not clear if there is a way.
In the best scenario it will be an excruciatingly long transformation (~50 yr) as car oriented cities (or city sections) get slowly deprecated and the car-free or car-lite segments become more desirable, more livable.
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.