This is fascinating and a very cool concept to be able to clearly respond to specific points in a technical discussion. I agree that sometimes these discussions are hard to follow and sometimes get derailed by minor quibbles. I'm plenty responsible for starting to debate about minutiae in a meeting when it really doesn't advance the conversation meaningfully. (That's more of a synchronous issue, this works at improving asynchronous communication, if I understand it correctly).

One thing that isn't immediately clear to me is how to associate specific individuals to a comment. Sometimes knowing who made an argument is very important. I like to believe that people are a little more careful about forming their reasoning when they are debating with the author or maintainer of a project, for example.