Formal writing gets help along the way: you can take time to revise it and enlist other people to edit. But informal writing happens in near-real time: not only does this make it hard to go through multiple drafts, but you also need to express your emotions in writing while you’re still in the grip of them. Even the most professional of writers can’t use all their handy tools and tricks when the other person can see that you’ve started typing into the chat box.
