I live in Dublin, which is at least in Europe so better than many US cities, but certainly not very good on bike infra. I've never owned a car, and planned to keep it that way until... I got a (large) dog. Kids seem a reason many cite, but at least they're allowed on public transport, and the available child-carrying bike accessories are varied & plentiful. Large pets seem to be the seldom-talked about unsolved problem of a carless world - I was a bit shocked at myself at how many transport challenges I hadn't anticipated when we decided to get a dog.