@starbreaker I quit facebook too, but the network effects aren't to be ignored. FB have been very successful at instigating themselves into the center of social activity for a lot of folks, and asking people to give up those connections is a big ask.
Also, it's particularly harder for people who are already being asked to do a lot of emotional labor to maintain social connections. Quitting FB is much harder if you're the "social representative" for your family.