Those cultures are still connected to their mother cultures though. Though they start to become unique as they mix with American/other cultures the link and the

Those cultures are still connected to their mother cultures though. Though they start to become unique as they mix with American/other cultures the link and the advantages it confers have stayed whole. The studiousness of Chinese immigrants for example is a downstream effect from the exam based society of ancient China and is a feature that took hundreds if not thousands of years to develop. It's also not a perfect feature despites its evolution, it often trades max top speed for stronger initial acceleration.