By making Instagram and Messenger interoperate, Facebook is entrenching itself, making it harder for a regulator to break it up and for rivals to unseat it (Shira Ovide/New York Times)

Shira Ovide / New York Times:
By making Instagram and Messenger interoperate, Facebook is entrenching itself, making it harder for a regulator to break it up and for rivals to unseat it  —  The more Facebook knits together its apps, the harder it becomes for a government to break it up. … Facebook's changes under the hood are a power grab.