Earlier quoted context omitted.
While this is true, I think twitter still greatly increases his outreach. It's the only reason most of us are hearing about him. Otherwise, I would definitely not be reading his blog. While I'm sure he would have a dedicated audience, it's not twitter. Not only that, but the more people start personal blogs the less viewers the harder it is to compete for views. For Stephen King, a generational talent, it may not mat…
Twitter is not greatly increasing Stephen King's reach.
I think this is true for many significant accounts on the platform: I'm not going to read their blog or watch their Youtube video, but I'll probably see someone resharing a tweet they have made, whether on Reddit, HN, a news website etc.
Which is where I see the huge value in Twitter: a mainstream platform designed to present content in bite-sizes, appropriate for discussion or resharing. Twitter is a reach multiplier for many accounts for this reason.