People do not stay on Facebook because of its technology or features. They stay on Facebook because of the people they are connected to. I was in my 30s when Facebook came around, which was young enough to still care about, and be excited by re-connecting with old friends from school. The thought of losing touch with them all again made leaving Facebook a difficult choice. I eventually did so, but had to come to terms with the fact that I was dropping a large set of "friends" for the second time in my life.