I feel this. I'm well aware that if my partner wasn't on Facebook, we wouldn't have a social life. I HATE that fact, but that, sadly, is where people put their events. I don't think I'd join if she left, but I can't deny that I benefit from her being on the platform.

She won't leave until everybody else does, and they won't leave until everybody else does, and so nobody leaves. It's dystopian.