It is a super generalization, as you say, but I question the accuracy. I'm not saying you're wrong, but I don't know that you're right. For opposing anecdata, I present my parents who recently gave up their landline while in their 70s. Granted, Mom was debugging IBM 370 core dumps before you were (likely) born, but there ya go. What I have not done is survey their friends and neighbors, or if they're are an anomaly.

However, one thing that might push even the elderly to getting rid of the landline is phone spam. It's the reason my parents gave me. Granted, cell phones aren't immune, but they are more protected.

Me, 60 isn't that far off, but we gave up our land line years ago. But I'm also commenting on HN. :-)