Dark Forest Theory
I came across this idea 1 2 by Yancey Strickler , that proposes that the overload of information is pushing us to spaces with restricted access. Instead of sharing publicly on Facebook, we have Whatsapp groups, Slack channels, etc. The idea was developed amidst the discussion about Russian meddling in the US election .
I can relate to some of the points, but I also think it is a very superficial read on the overall feeling, especially if one takes into account younger (and older) people. The ~40 year olds of 2020 are the hinge generation. However, some aspects of what the article discusses may be hinting to the approach Facebook has on 'privacy': creating groups to which one must be accepted to join.