https://phys.org/news/2019-03-outsourcing-speech-social-media.html

This very much includes Facebook's decision this week to ban white nationalist content, a move that critics have demanded for years and that Facebook could have introduced at any time.

On the other hand, you have democratic governments (leaving authoritarian countries like China out of the mix) that have become far too comfortable exerting behind-the-scenes pressure on platforms to remove content or withdraw their services in the absence of legislation or formal legal orders.