Decentralisation is a moving target. You look at the web itself, it started with a protocol (HTTP) and a single client, a browser called "WorldWideWeb", which they renamed Nexus in 1994 to avoid confusion with the broader concept of the World Wide Web. So the first "WorldWideWeb" was basically Chrome. And that means the web at first was totally centralised. Other clients then appeared and evolved, making HTTP more robust (Line Mode, Erwise, Viola, Mosaic...) This idea that HTTP appeared and then the web just sort of "happened" on top of it is widespread but totally false. That's the path ATProtocol has said it wants to go. For that to work the protocol has to get more and more decentralised as time goes by, and that means more and more independent implementations have to appear to take away market share and mind share from the Nexus-like flagship demo. That's how many decentralised protocols have developed. And the opposite is also true, many protocols that started off pretty decentralised have gradually become more centralised over time (which arguably is what's happening vis a vis Nostr relays if you go by nostr.band stats). Time dimension is important.