19, it&#x27;s like 30&#x2F;70 SMS&#x2F;Facebook in my experience. (Then there&#x27;s Snapchat, but that is more of an overlap than a replacement.) I think part of it is that Messenger handles groups well and everyone is on it without needing a number.<p>Frankly I hardly use Facebook-the-social-network much, but I use Messenger all the time.