I ditched the car completely when it was still only at the concept stage. I am now 61, have never driven, and never will.
As long as you don't choose to live somewhere without reasonable public transport and beyond sensible cycling range of where you need to get to, then you do not need a car. Wanting one is a different matter ...
I accept that I often can't be spontaneous. Things need planning. For example, I want to organise a forum ride taking in Great Dun Fell but it will probably involve at least 2 trains for me each way. I am spending quite a lot of time looking for the best fares and minimising connections.
As a non-driver you need to adopt a different mindset. My niece offered to drive down to pick me up from the station on arriving in Coventry for a family gathering. I told her that I could walk it in 25 minutes and it was dry, so no need to use the car. She thinks like a driver, I live like a non-driver.
I know people who have given up owning cars, but who hire them a few times a year when driving seems the best option. I know others who gave up driving altogether because modern traffic levels were stressing them out.