"Facebook split Messenger off into its own app to save you one extra click on the Messages tab."<p>Uhm, what? What they did was forcing their users to open up a separate app to do something with was working great already within the app, without having to open up a separate app. But now every time you want to do messaging, you have to wait the extra two seconds for "Messenger" to open up.
What a terrible example by the TechCrunch author. Maybe he was ironic?