Earlier quoted context omitted.
He is a EU Citizen. That’s not that much better than the freedom to work or live wherever you want within the US. It only sounds so impressive because those 27 nations are all substantially smaller than the US. It’s nonetheless one of those achievements of European integration I most certainly don’t want to give up.
The US (mostly) all speaks the same language and has a much more similar set of laws and a largely homogeneous society. By comparison e.g. Spain and Germany and almost any two countries in the EU you care to name speak different languages, are very different culturally, and have different customs.
Apart from a few of the more 'third world' european countries (like France) if you speak english and work in high tech it's not a big problem to work in Scandanavia/Germany/Netherlands. The main difficulty is they drive on the wrong side of the road - but as consolation the coffee and women are much better.