Better naming would be "Compensation across Europe's biggest tech hubs".
I don't agree to generalize over Europe if you cherry-pick the few specific places where the 1% of the (top paying) jobs in the continent are.
If we cherry pick, we might as well be specific. It's why we refer to SV wages and not US wages. The difference is massive.
Europe tech wages as a whole, as pretty shit overall.
Most companies are happy to pay your relocation costs and / or get you a place till you find one on your own.
You can also fly rather cheaply if you miss your family, so this reads very weird to me.
But if you have a nice life, a nice social circle of friends, ...etc, do not take all that for granted. You won't magically get all that back once you move. You probably never will to be honest. You will meet other people but building a social life from scratch in a new country is hard and you will end up with a lot of shallow relationships, or maybe nothing at all.
But it really depends on your personal situation. If you are a 20 year old nerd with barely any social life to begin with, go ahead. It might even improve your life.