A very sad day for everyone in Europe. The EU is not only about trade regulations, but about a continent who had a not very peaceful history finally growing together. The freedom of movement for European citizens was not only "convenient" but in fact an important civil right. When you live or have a business in one state of the US, you are bound to local regulations of course, but being part of the US granted you a l…
What is weird is that english is the de facto language throughout the EU. There is so much integration that the new regulation will have to effectively re-establish the rights lost by brexit. UK will have to essentially become switzerland. I cannot see it being differently without people from both sides literally rioting.
There are many treaties between Switzerland and EU, and after they slammed the door I just don't see EU countries accepting the same deals with UK.