Better communication and mobility does a lot. Maintaining the home country’s language in the second generation these days is hard. I know some kids who speak their parent’s native tongue poorly and some not at all. When they speak it well, it’s because of constant effort by the parent. Maintaining it in the third generation is extremely difficult and often doesn’t happen.

It’s similar for other aspects of culture. No matter where you’re from, I bet your grandchildren if not your children are going to celebrate Christmas in some capacity.