Facebook bravely admits that it is a problem and suggests we spend more time on Facebook https://qz.com/1158984/is-facebook-fb-bad-for-you-facebook-says-it-is-and-the-company-has-a-solution/
The case against reading everything | The Walrus https://thewalrus.ca/the-case-against-reading-everything/
While Twitter allows 280-character tweets, not consciously trying to write that long means that if you're aiming to write a "normal" tweet, you can go over without having to think about it and edit so much. It quickens the process.