Where did everybody go...and why?

Okay, so I've noticed there's a lot less action on my main feed and I assumed it's 'cause I muted a whole lot of people...

I unmuted almost everyone on the list and I'm still not seeing as many posts as I used to.

Granted I haven't been here as much as I used to be either but what happened? Did I miss something? Did everybody just go quiet or did they leave?