This puts into words something I’ve been thinking about for a while.
By making communication effortless, it can rob it of the investment from either party and therefore remove the thing that feels nice about a friend contacting you to catch up. Or a thoughtful postcard from your other half on a work trip (vs a FB Messenger message.)
Deciding who you want to stay in touch with, how and why is all part of what makes relationships feel valuable.
Furthermore, getting older, I realise that some friends drift away for a while but sometimes return to your life for certain phases. Staying in touch passively doesn’t change that. And tech has made it far enough in that you can almost always easily find someone again if you need to, regardless of if you are Facebook friends.