“One of writing’s traditional advantages over speech is the time it affords you to collect your thoughts. This time empowers you to calculate your words’ effects on their reader. Rather than blurting out “YOU’RE SO HOT,” you pen a pleasing phrase: “Shall I compare thee to a summer’s day?”
Text and instant messages, however, are eroding this advantage. We don’t correspond over text and instant messages, like we do in letters; we chat in quick informal exchanges, like we do face-to-face. One of the underpinnings of spoken conversation is what’s known in linguistics as turn-taking. “We need some way of determining when someone else’s turn is over and ours can begin”.
The most common-sense workaround, of course, is to prepare your thoughts mentally before you begin typing them. That sounds easy enough, but some of us actually use writing as a way of working out our thoughts, not simply recording them after they’re fully formed. If nothing else we don’t consider the words blurted out of our mouths a finality but something that can be correct as can a word be spell checked after the entire paper has been written.”
But the main disadvantage in today’s day and age is we don’t allow for inflection or correction. We base off these new instant messages containing little more than an emoji or meme. We aren’t using writing as a way to expand our meaning, but as a crutch to avoid speaking all together.
Some ideas in this article were quoted from this and combined with my own thoughts. — http://www.newrepublic.com/article/116268/gchat -typing-indicator-most-awkward-feature-online-chat