You and mortehu upthread have mentioned Schengen in the context of being allowed to reside in any country within the area. That's not what Schengen is about, yo

You and mortehu upthread have mentioned Schengen in the context of being allowed to reside in any country within the area. That's not what Schengen is about, you're thinking of the European Economic Area. Schengen is a customs union which allows passport-free travel within its borders, but the EEA is the area you can freely migrate within.