Also, Facebook itself, not taking into account its Messenger, is dying out - 90% of the newsfeed is covered with posts from sites like The Verge or any other sites that you follow.
The actual amount of stuff that you care about is 2% of it all. Can't honestly remember someone posting a legitimately interesting status update. Instead, I see selfies and news.
Also, choosing not to support Windows Phone (and apparantly not even recording WP users' requests) is a really stupid move in my opinion.
Furthermore, I see no reason why Snapchat should be preferred over Facebook Messenger. If you want to share a moment with a friend, you might as well share it for more than 10 seconds. Messenger always works reliably for me. Snapchat doesn't. Case closed.