There are more levels than that
I started sorting out our BrExit alternatives and had the person in the passenger seat (the SWMBO) yank the handbrake for the time being.
When you have two kids in school at least one of them will be within a year or two of exams either here or in the "retreat location". You really do not want to move them at that point. Though at some point a lot of us will have to - there are at present 4-8 job openings in Eu versus UK and that ratio is continuing to grow.
So if the current trends continue, the SWMBO will let go off the handbake. Leaving the politics aside it is pure economics - the businesses are voting with their feet, err R&D budgets. We will have no choice but to follow - there are families to feed.
As far as locations, Berlin is not bad by the way - they have been rebuilding it at a frantic pace for the last 20 years. There are better places though. All of them massively advertising too - Stockholm, Dublin, etc are all taking slots and spreads on both Internet and printed media. Can't blame them too - it is not personal, it is business.