Like your parent said I see FB as "essential social plumbing", not the most glamorous or best but a necessity and way to connect to people before you go "off FB" to another app or SMS to chat/interact. The only reason I "post" to FB is b/c my Twitter posts to FB. I rarely use Twitter except from trying to get companies attention after having them ignore support requests or not having any other support at all. Multiple times I've used a websites/app's built in ticketing system only to get no response. A pissed tweet a couple days later and I've got a response within the hour... The squeaky wheel...
And 10 years ago I wouldn't dream of not having my ICQ friends. Your dreams are not the /most/ relevant.
> If specialized apps start to show up, people may start ditching FB altogether.
I assume the same will happen in my life for Facebook, Reddit, Twitter, etc. One day I will just stop.
^I use IRC for dev stuff now, but there was a good 5 years where it was no longer a part of my life. I was a gamer who played CS in the early 2000s.
Will they join later when they move out and seek ways to stay connected with family? Who knows - but I can definitely see why they're not there yet. I'm older, but the only reason I joined Facebook was to have a way to keep in touch with family once I moved 2000 miles away to California.