Not to mention that email absolutely sucks. The confusing threads, the forwarding, the constant CC'ing, someone making it or not making it into a list, the spam. It's absolute garbage. In fact, people have been seeking alternatives since the late 80s. IRC was a precursor to Instant Messaging/Slack that many techies favored. Not that async is some perfect communication strategy (it has its own baggage), but it definitely fills some of email's gaps. Personally, I think Google Wave was ~15 years ahead of its time, and we'll see something akin to it soon.
Will the author's next big revelation be "How to use a hammer for everything?"