[KozmoNau7]

For all its faults, Facebook is very useful for arranging events and makes it easy for people to RSVP and provide/ask for more information in the event posting itself. It also provides a low barrier of entry and low complexity way of creating groups for discussion and sharing between friends. This is extremely helpful for people who aren't super tech-savvy.

Yes, you can do this stuff elsewhere, manually keeping email and phone chains going, but FB does put all of this stuff in one place and makes it relatively easy to use.

That is not the problem with FB. The problem is all of the other junk they keep pushing, all the ads and games and gamification.