Nobody said that was the final step, let's face it, this whole thing is not going to pop out of our asses like a beautiful golden egg, fully formed and valuable. We're going to have to divide and conquer, break it down into steps and stages.

Also decentralized can be achieved in other ways, like simply by letting users download the message base. That has a number of advantages to it too, like it's simple. Keep it Simple Stupid is a fantastic principle.