I find this conversation a bit puzzling. Many Brooklynites are already moving “Out of Town” albeit staying in the tri-State area. Housing is a lot cheaper, and for the most part they can retain their jobs and have a nice choice of schools for their kids or (in the cases of Staten Island & Linden from BP) bus or drive them to their original schools. And all Jewish amenities are still a jump, skip, or hop away…
I’m aware that most here arbitrarily decided that Lakewood, Monroe, or Staten Island is considered “in town” either due its high heimish population density or close proximity to Brooklyn, but each community has its quality of life perks with much more affordable housing. Which begs the question, why move out of NY & NJ if you can have your cake and eat it too “locally”?