I have met few couples abroad, and I saw how they suffered because their children didn't share their affection towards Poland.
I was working in a different part of my work to normal and met a woman who had been here for over 30 years, married to her Scottish husband. My friend asked what nationallity she was and she said a mix between Scottish and Polish. Her accent was mostly Glasgwegian, tinged with her Polish accent only slightly, not surprising to me since she had been in this country longer than I have (since I'm only 19).
What did surprise me was when I was asking about her children. I knew they were born in Scotland - but I asked if they spoke any Polish if they had been to visit Poland before and she answered no to both. "They're not interested," she said.
I think that if that was my own situation, I'd be saddened that the country I was born in and grew up in was of no interest to my children at all. She looked like she couldn't care less. She then also told me that before Poland became part of the EU and Polish people started to come into the country, she hadn't even met another Pole in all the time she'd been here - and had to get used to using the language again once she did. She had forgotten a lot. I said that I thought it must have felt good for her to be able to speak with other Poles again, but again she looked like she could care less and shrugged.
I can see why it would matter to some though, for I can't imagine it not mattering to me.