Back in my younger youth, my father wrote letters to his parents a couple times a month, like clockwork. That's the U.S. Mail, to you whippersnappers.
Dad's 85 now, still lives one street over from me (where I grew up). I visit 2x/week to sit and watch TV and chat. I see him at football and basketball games, and track meets. And I see him at church each Sunday.
No matter how much time I do spend with him, when he dies I'll regret it wasn't more. So I savor the time now. And he's telling stories about him and Mom that he never told us before - how they met at work, how some co-workers set them up on a date, details of their courtship and wedding, being newlyweds living with relatives and no money or job, etc.
My sons are 22 and 24, they see us as little as possible - but they'll text us in a heartbeat when they need something, lol. Kinda like I was back then, except for the texting.