It says
here (in Dutch but of course) that after the mayor made his announcement that foreigners can buy weed again in coffeeshops, the drug dealers selling it in the streets have disappeared. Within a couple of hours in fact. And that, ladies and gentlemen, was the whole fracking point of coffeeshops in the first place. Making sure that people don't have to buy it in the streets where the distance between marijuana and heroin is virtually non-existent.