I've had my licence since I was 17. At home we always had cars, and I always drove everywhere. When I backpacked Europe, I managed 5 months without a car, and my eyes started to open. Not long after, I moved to inner city Melbourne, and was soon desperate to get rid of my car - hated the traffic, and the stress, and the loss of time that driving represented.
Never managed to get rid of it while living in Melbs, but consolidated hubby and I down to one very early on - before we even moved in together. He just used mine when he needed one.
Now we're in Brissy, where we really got into it. New city, new routine. We bough 3 tanks of fuel in our first 5 months here, and one of them was at Goondiwindi, on our way in! The car was only getting used on weekends for an occasional trip to see ym sis in Byron, or go to a restaurant out in the burbs, or to do the supermarket shopping, and it struck us as ridiculous to spend so much per year on something we used so little. Then I crashed the car, and our answer was there for us.

Now... I ride to work (catch the train on off days, like if I'm sick or injured) DH has a bike trailer which he loads up with groceries for shops. On the weekend he also loaded our barbecue onto it and took it down to a park with some friends. We hire a car if we want to go somewhere, like down to Brunswick Heads this weekend, or sometimes when family come to visit. If we buy furniture, we get it delivered.

We might change.... right now I wonder about late night meetings when I'm too fat to ride any more, although everything else is under control for now. Or when we do have littlies. But I'm pretty sure the car dealers will still be around.