I asked a couple with a 3 year old daughter how they get around without a car, and they said they cycle by default and use a car-share service occasionally for longer journeys. The amount they save on insurance alone pays for the car-shares and short term car rentals to get out of the city for a few days.

Suburbs and rural areas can benefit from electric bikes to an extent. And a more deliberate focus on building transit oriented communities should help quite a bit.