It's interesting how some cultures integrate completely - assimilate, really - and some don't.
By and large, the descendants of former yugoslav refugees in Denmark are pretty much invisible in the statistics and also culturally.
On the other hand, in Tilst where I live there's a large Vietnamese community which has been here since the 70s and is still culturally strong. Many people still only speak Danish with thick accents, and they're likely to be at least 2nd generation in Denmark. Of course, others are fully integrated - there's bound to be some confirmation bias at play.
Even within the same cultural sphere you'll have differences. The Danes who emmigrated to the US more or less assimilated completely within a generation, whereas the Finns and the Swedes seemed to cling more to their nation of origin and language.
I find this kind of thing fascinating, especially because the public discourse around it is so simplistic.