The other side of this is the potential for car-sharing, reducing the total number of cars around, but allowing people to still make more infrequent journeys by

The other side of this is the potential for car-sharing, reducing the total number of cars around, but allowing people to still make more infrequent journeys by car when that's necessary (or just easier). If your bike is enough for all your regular weekly journeys, you can rent a car for holidays, or visiting friends and family further away.