Friends, news feeds, public or private posts, following.
Why Facebook is the only model of "social network" and its features considered the canonical "social network" features? No one is ever going to make a social network that does not resemble the experience of having infinite things to read and the urge to share everything that happens to you in a personal space, expecting it to be shown automatically to others?
Is this really how a "social network" in the real world works?