Final paragraphs below; also see Death of the private self: how fifteen years of Facebook changed the human condition | Guardian
"Can the social-media giant stay as influential in the next 15 years as it has already been? At the risk of being wrong about Facebook again, that seems unlikely. This is partly because its impact has already been so extensive. But it is also because of growing unease with the platform. As with all new technologies, from the printed book to the telegraph, social media can be used both for good and bad. Critics of Facebook are increasingly vocal about the harms, pointing out that Facebook is addictive, harmful for democracy and too powerful in making decisions about what content people see. “Big tobacco” is what the bosses of several top tech companies have started calling the social network, and politicians are speaking openly about regulation.Facebook turns 15 | The Economist
Though it has just posted record quarterly profits, it seems unlikely that Americans are going to increase the time they spend on Facebook proper. Time on its core social network is declining, probably because users are questioning whether it is as enjoyable as it used to be. Adults in America spent 11.5% of their online time on Facebook’s main platform, a fifth less than two years earlier, according to Brian Wieser of Pivotal Research. Instagram use is rising, but not enough to make up for the core social network’s decline. As more people question whether social media are good for them, Facebook could loosen its grip on America. The relationship with Facebook continues, but the love affair is over."