These articles ignore people’s real alternatives. I’m in my 30s and have a small child. While I love to fly into Chicago or New York for a night of drinking with my still-single friends, that’s not really something I get to do more than once every couple of months. Seeing my wife’s extended family (3,000 miles away in the west coast) is a once every year thing, and seeing my extended family (7,000 miles away in Asia)…
For sure, Facebook allows you to keep up with distant family and friends. But my take is that devoting a lot of mental and emotional energy to distant relationships comes at the expense of time that could be spent developing local relationships, which can be more important. I think a good metaphor is after you've broken up with someone, it can be healthier not to hold onto to a lot of photos, memorabilia, and so on a…
This implies that one replaced the other, or that one can be brought about by eliminating the other.
IMNSHO, this is a form of false nostalgia: I saw how much of my parent's generation lived: for most people, social networks haven't replace real world socializing.