You can easily live in Seattle city limits without owning a car, and our transit story is pretty bad. In a city that really funded transit it would be trivial.
Why the condescending state-the-bleeding-obvious question? Renting and sharing makes little sense for me personally. I answer a similar question here re taxis and public transport: https://news.ycombinator.com/item?id=31690450
- you limit your friends and family to those that live where you can access them.
- you choose sports that don’t require remote locations or large equipment (no mountains, no surfboards, etcetera) or you live where your sport is.
- you move where you can access your job, or you limit your job prospects.
I have lived without a car in a variety of places in the world. Public transport is great if you can accept the set of limitations imposed upon you.