Imagine how much nicer driving around in the suburbs would be if the majority of vehicles were town cars like Honda Fits, mini-mini-vans like Honda Freed, pre-2003 Tacomas, and kei trucks/vans instead of the usual mix of unreasonably tall and boxy crossovers/SUVs and brodozer trucks.
I think you probably know this because you used the US name for the car (internationally known as the Jazz), but for those who don’t, Honda discontinued the Fit in the US market due to poor sales. For every internet comment bemoaning the lack of these vehicles there’s the actual fact of revealed consumer preference in the US market.
Well I don't think it would be that much different, truthfully. The problem of the suburbs is a matter of layout and zoning, not so much the vehicles used. If you fix the layout and zoning it'll naturally reduce vehicle size.