To give my personal answer for it, there's no other cross-platform messaging service that everyone uses. There are other chat services sure, but the Facebook h

To give my personal answer for it, there's no other cross-platform messaging service that everyone uses. There are other chat services sure, but the Facebook has by far the most number of people I know on it. Also, not everyone I know exchange numbers. There's no usernames, etc on Facebook so its easy to find people too. Weird, I know, but guess generations are changing. Apparently now Snapchat has become the main form of 'communication' for many millennial with their friends. So looks like I'm falling behind.