The Asians are moving into the low avenues of Boro Park, displacing the frum community there.
The average Sefardim are generally wealthier than the average Askenazim, permitting them to afford the increasing cost of housing in Brooklyn.
The hippies and other secular people are increasingly purchasing homes in Williamsburg and all other Brooklyn neighborhoods, causing continued increase in housing costs. They want to live near Manhattan, since they can’t afford Manhattan itself.
The young Askenazim are increasingly moving from everywhere, not just Brooklyn but Brooklyn as well as even almost every other out of town community to Lakewood. Chassidim are also moving to the Monsey area. This is causing Brooklyn and out of town areas to lose growth in their young communities, which as a result is increasingly shrinking.