Being an expat still comes with tax obligations to the US, no matter where you live in the world. I moved to Germany but I still have to file US taxes every year unless I renounce my US citizenship someday. That’s one the most notable downsides that I can think of.
Haha. I read that a lot, but it’s honestly not so bad as long as you stay away from the Hauptbahnhof. That area is truly awful.