Somewhere in the A/B test slurry there is sometimes a menu item that sorts your news feed chronologically. It really lays bare what a ghost town Facebook is. In my default feed there is all the garbage that you described perfectly, and a burst of content like a friend’s wedding. That little nugget gets replayed over and over so that it feels like that’s what’s “going on.” Chronologically, it’s old news and no one I’m friends with has posted anything for over a week, just random garbage.