When blockchain equals AI then centralization will equal a singularity of that AI and the total control that follows will be the darkest age ever, but during that dark age humans will be ruled by AI and only when the technology is completely destroyed will humanity regain it's freedom. But that also why we must fight to be smarter than a centralized AI. At least with Steemit we will be able to understand them because they will have to talk to us in order to gain any power over the currency.