I have been off Facebook since April 2016. I've been completely content and haven't missed it at all. But I rejoined today because of a family situation. A few days ago I read the obituary of my cousin in a newspaper. If I hadn't happened to see it, I would not have known he was dead. I don't have a landline anymore, and I'm not in touch with most of my cousins except via Christmas cards.
The world has changed, and I guess I must change with it. We used to all have telephones with our numbers listed in the phonebook. If someone didn't have access to a regional phonebook, they could dial information and find out our number and call us. I even remember the days when the operator would tell you the address of the person whose number you were seeking.
Today, both Michael and Estée called to say my late cousin's daughter got in touch with them via Facebook, having found them by their last name, so they could tell me of his death. The incident left me a bit shaken, and made me realize that this is a strong reason to be on Facebook.