Happy to contribute what perspective I can :). I didn't mean to put it as a hostile US vs. EU thing, just wanted to state my reasons for going the other way.

I saw in another comment that you said it would only be for a few years. In that case it's a bit different as I was going off of the assumption it was long-term/permanent, so it could be a more worthwhile experience.

I would say that it could even be beneficial for the kids in terms of their English skills and getting a more worldly experience. Most Germans I know speak good English, but some of those who have done study abroad programs in the US have definitely mastered the language and accent, which is especially useful in STEM as almost all research is done in English these days.