I think this was the premise of the original World Wide Web (minus the cryptographic part) before everything was centralised. Essentially people would have their own personal web pages and readers subscribe via RSS.
That’s, to a large extent, what the WWW is today. I have my own personal site, and a collection of RSS/Atom feeds that I check to see what’s happening on other people’s personal sites. It’s surely an exaggeration to say that “everything” is centralized, despite the rise of the huge monoliths such as Twitter.
