Walter Isaacson's Elon Musk book is out. It kicks off with the following quote:
"To anyone I've offended, I just want to say, I reinvented electric cars and I'm sending people to Mars in a rocket ship. Did you think I was also going to be a chill, normal dude?"
I like to think of it it with the question: what is to reading what a text-editor is to typing?
Social features for sure. We could also experiment with crazy stuff like SYNTACTIC SPACING. Here's an illustration on a paragraph from Doug Englebart's Augmenting Human Intellect: