> I'm old enough to remember internal borders with passport checks in Europe, before the wall fell and Poland was still on the other side of that. Nice to see them moving on from that.

Europe is the outlier here. The rest of the world checks your passport when you come in their country because they like to know who comes and who goes for a lot of reasons including public safety, biosecurity and so on.

The fact that Europe has basically given up on trying to filter who comes in is not necessarily a model that is desirable for the rest of the world.

> Thanks to the EU free movement of people, I've now studied, worked and lived in four different countries.

You can do that without Europe as well. Do you think people did not move to another country or studied in another country before the European countries decided to remove borders? What about now with all the students moving to the US/UK/Australia/Canada?