I think the sensible model is to eventually get rid of most car traffic in city centres, and concentrate the parking spots in suburbs, with adequate public transport to denser areas.

Personally I couldn't live without a car. Not because I need it much in the city right now, but because I need it to reach my relatives and meaningful places in the countryside, far away from any public transport. Cost of living is also something to consider, not everyone can afford a proper house within reach of public transport, and living in a flat sucks.