I barely use facebook's website, I don't post anything but keep a account around for family, folks who want to use messenger and the odd event/group. It's a bit like having that hotmail address from highschool for the odd person who has that as your only contact point. I kept AIM and ICQ around for a long time for that reason.

I think younger folks have migrated to Instagram, snapchat, etc. where they actually post/use the platform.