Do you know anyone who’s never stepped foot outside of NYC? What are they like?

My grandma was born and raised in the Bronx. She once told me how when she was a kid learning geography in school, she used to think to herself “why am I learning this? I’m never gonna step foot outside the Bronx.” Ultimately she very much did travel once she got older, but it’s got me wondering. In a city of 9M people, I’m sure there are some folks who basically never actually go outside the city limits.