Considering how everything is now connected, every economy, etc. I seriously doubt any remaining island will be “happy”. Anyone on this island will know friends, family outside the island.
I got three down votes on my previous comment and did not get why, I guess hard facts are difficult to accept but I also appreciate my comment was quite doomer style. What I mean is that European countries and elite are responsible for their lack of coordinated strategy in any kind of communal threat, at least on major topics like how to deal with USA, China, Russia or mass Africa and Middle East immigration. Each country act as a sole actor and is very easy to exploit that for Trump or external agents. Some places, that are still able to advocate for themselves and their interest in a strong way will keep to thrive: Switzerland, Norway, some regions in Germany (Baviera) or the north of Italy and I see good politics and growth in Poland and other East countries.
Recommendation: use a client where you cannot see the downvotes. That’s what I do.