France is a country so like you’d have to gain citizenship somewhere else… where in this example they just move states.

About a million people leaving the city probably. But more seem to want to come than are leaving. Growth cant be infinite we can’t build one million more apartments. Maybe The city is going to get harder to deal with the policies liberal or conservative and costs etc that might be the catalyst to get ppl to give up and leave. Cause some economic and social despair which hopefully leads to a correction. then we head back into ppl wanting to live here and everything increases.