People are lazy, anything you can make that will simplify their lives is winner. This one feature certainly helped Social networks grow over traditionnal forums. Look kids, you can post stuff but you don't have to type anything, how cool is that? 😜
I feel like the chats can get a little crowded or awkward when they have more than just two people in them. It would be nice if chats with more than two people showed the name of the chatroom instead of the names of all participants.
See this image