Perhaps they'll be replaced with visas that don't lead to citizenship, so you can still live there but not travel on a European passport. It's tricky, because

Perhaps they'll be replaced with visas that don't lead to citizenship, so you can still live there but not travel on a European passport. It's tricky, because a lot of countries see "live here for a long enough time and of course you should become a citizen" as only fair. But it might keep everyone happy.