It is not some amount of centralization. Our experimental university work sees all startups cheat with servers. They still sell it as Web3. If you run the servers, you need to police the service! You simply become Web2 again. It should be self-organising and pure, like Bitcoin.

Scientifically Web3 consists of: peer-to-peer technology (e.g. Bittorrent) with a distributed ledger (e.g. Bitcoin) and the social practice of sharing (e.g. Github). This will take 10-15 years more to develop further. The startups are very noisy and are now discovering that doing real "distributed systems" is very hard. They consistently cheat by using central servers. Adversarial Byzantine attacks are unsolved (or require wasteful proof-of-work to yield no performance).