I've been car free since I moved to NYC around 4 years ago and I love it. I do wish car rentals were easier for those odd cases where you need to move something big but don't want a U-Haul, but I love just being walking distance from everything I need. My whole world fits within about two long city blocks.

If I weren't in the city (and specifically this city - Boston is not as friendly to car free folks) it would be a lot more difficult. I especially don't know how people with disabilities manage because public transit here is, for me, not super disability friendly.