I live 4 hours away from my parents and the DC and I see them 2 or 3 times a year for 2 or 3 days at a time (mix of they come to us or we go to them). As time has gone by the DC (now a teen and a young adult) are more and more reluctant to visit and the visits have become shorter and further apart.
I also speak to my parents every couple of weeks. When the DC were younger we talked a lot about how they were getting on, things they were doing at school, activities they were involved with, issues they were having etc. As they've got older it doesn't feel appropriate to talk about them behind their backs, so I keep our conversation fairly bland "doing well at school", "tends to just spend the weekends with friends".
My parents complain that they hardly know anything about their grandchildren any more. However, my DC both have phones, they are a older teen and a young adult ... I don't think it's my job to act as a conduit of information. If my parents want to know more about their grandchildren, they can surely contact them directly?
So just wondered how others' teens/young adults relationships with their grandparents work? Is it still up to you to facilitate them? If so, when does this stop!?