It's meant to convey emotional sincerity with positive connotations, compared to the un-punctuated and often sardonic or sarcastic chatroom and text message wri

It's meant to convey emotional sincerity with positive connotations, compared to the un-punctuated and often sardonic or sarcastic chatroom and text message writing that millennials were the first generation to grow up with. In that writing style, a period "." means you are serious enough to use punctuation, but in a negative way: you are annoyed or upset. A "!" means that you are also serious enough to use punctuation, but trying to convey earnestness or something positive. People love to psychoanalize the millennial generation from a distance. Why not ask some millennials why they do it?