Even old New York was once New Amsterdam...
I started thinking about this as it could apply to Lubavitch, because I think they are a fairly unique group. Seems to me that the majority of growth in Lubavitch, since the Rebbe announced kiruv as a major goal, was accomplished by BTs to that movement, as opposed to some population explosion of core Lubavitch. The thing about these BTs is that for the most part they seem extremely well educated and intellectual. What is fascinating to me is that most of the children of these BTs wind up going to Lubavitch schools where, at least in my understanding, there is not a very strong emphasis on intellectualism.
So the first question is - how do the BT parents of these children feel about this? Are they upset over this; do they believe that in an ideal world their children should get the same type of education they did, or do they believe that the education they received is a bad thing and their children should be kept away from it?
Or is there a third possibility where for whatever reason, the parents had to make an either/or decision, because the Lubavitch community did not allow them to have both. Either you consider secular education and intellectualism to be valuable, in which case you will never truly become a part of the Lubavitch community, or publicly renounce this and become one of us. Could this be what is happening? And if that is the case, most BT parents would choose the latter?
So getting back to this idea of neighborhoods turning over - what if there were a rebellion in Lubavitch where enough of the BT families were able to essentially overthrow the old regime and allow a synthesis of secular education and chassidic Judaism. After all, Lubavitch always was considered the most theoretical and "bookish" of the chassidic movements? Would it be possible to create this "Modern Chassidic" branch of Judaism. Could you get some type of "ice nine" phenomenon to happen?
(BTW, this is purely a hypothetical, stream of consciousness idea. I have no stake in Lubavitch whatsoever)