Yes it happens on the margin and once you have roots, it's unlikely you'll leave. But these kinds of things happen all at once and it's hard to reverse.

If you look at Detroit which was a manufacturing hub for a long time, it would be difficult to imagine a world in which they were irrelevant. All these people built lives there and there was all this specialization and industry there. And it worked well until it didn't.

Once a place loses its dynamism and people have had enough, it'll be very hard to get them back