For a product change that massive and anti-user-desires, you're kidding yourself if you think there wouldn't be a million challengers ready to fill that role. Hell, it could be as simple as people using other successful social networks more (Twitter, Snapchat, Instagram), and they'd sure as hell capitalize on the void left by Facebook by introducing features that bring them closer to providing the activity Facebook was pushing away.

A Breitbart social network, maybe, if it has to come to that