I don't see what problem decentralization actually solves. If you want fragmented special-interest communities of like-minded people, that's been easy to do for

I don't see what problem decentralization actually solves. If you want fragmented special-interest communities of like-minded people, that's been easy to do for years. Listservs, subreddits, phpBB forums, newsgroups. Something like Twitter is about global reach. A place that a notable person like Barack Obama can message 100M at once and even interact with them in a controllable way. All sorts of niches and interests and personal connections can happen at once. And when the platform becomes unusable in one way or another, there's an authority that can be appealed to and they'll make a decision that best serves the platform. In a decentralized world, when there's disagreements factions just part ways. The authority problem is really just that the decision-making right now is generally skewed towards what will maximize revenue.