By domino effect, I mean like a friend of Poland or Hungary in EU says "You know what, if you are kicking them out I am leaving" and that happens a bit
But yes, mostly won't matter as long as no core members are out of the EU
However I was reading something (I don't remember where it was from or the link) but it said that the top 5 countries in the EU (not in order) are Germany, France, Spain, Italy and Poland
But hey, this is just a theory, a political theory