Why didn't I lose my Brooklyn accent?

A silly question that I’ve thought about often. I was born in Brooklyn, but left during my teenage years. Problem is my Brooklyn accent never left! People tell me I sound like the Nanny’s mother from the TV show with Fran Drescher. My children were born in Virginia, and had a southern accent when we moved to Westchester County New York. which they lost within a few years. Not me. It hangs on! People always ask, “Are you from Long Island or Brooklyn?” I’ve been out of Brooklyn for 60 years!