This is true for Belgium as well, that traffic in the city center is essentially nonexistent (after 12h and the trucks delivering goods leave) in the major cities.
But living in these car-free zones is at least double as expensive as outside (and the more central, the easier it is to live car-free, the more expensive it is). It is also totally unrealistic to live there with a family, and if you want a job in center of Brussels and live in Mechelen (for example), you need a car. Train is barely doable and only if your employer is dead center brussels (e.g. Diegem, where "the internet lives", is not realistically reachable)
But living in these car-free zones is at least double as expensive as outside (and the more central, the easier it is to live car-free, the more expensive it is). It is also totally unrealistic to live there with a family, and if you want a job in center of Brussels and live in Mechelen (for example), you need a car. Train is barely doable and only if your employer is dead center brussels (e.g. Diegem, where "the internet lives", is not realistically reachable)