I've already got whatsapp, email and normal texts, facebook messenger has literally nothing that I want and poisoned any interest I might have had by removing itself from the mobile website in an attempt to force me to use the app whilst demanding my phone number.
With the amount of junk that's on there nowadays, it's even easier to 'quit Facebook'. The Messenger app makes it easier to do so.
I find that's getting harder and harder to do as they change/randomize the class/id of many elements at each page reload.
Their column container classes/ids are pretty static. I try to keep my custom stylesheet updated to nuke the left and right column sidebars, and expand the actual newsfeed to use the reclaimed width.
No more useless trending topics and clickbait news for me. I do not need to see the outrage-generators or the Kardashian headline of the day.