flatbush part 2- some of the above comments make it sound like flatbush is disintegrating thats a huge exaggeration – flatbush is & will continue to be an ir veem beyisroel
now 2 more cultural changes that had a profound affect
coming to your inlaws/ parents for shabbos & yomtov- married children coming home for yom tov was a nachas for younger siblings , parents & “THE SHUL” – the couples found a room in the house little ones doubled up & made it work , THAT CHANGED ! couples dont want to come to anything less than a suite with…. so now you have shuls that have a decent olam on shabbos but yomtov attendance drops & so does the ruach.
2. connection, OR LACK OF – if one is not connected to a rov , yeshiva , shul , chavrusa.. than i can make kabolas shabbos , carlebach style in a living room on the block, yomtov chanuka in florida , shavuos in the country.. & sukkos by an uncle in toms river
boropark is a whole diff story its because the kehilos are bursting at the seems with 1000 new couples a year , each chassidishe kehiila has a exact tally of births , boys , girls .. shidduchim- and a team that looks for properties & plans for growth if you were to get a behind the scenes peak at some of these high level meetings you would be blown away (its not near 10% leaving & its basically a certain segment of specific kehillos – for an in depth analysis go on to the ivelt website for the thread by neighborhood