The joke of it is that Web3 claims to be the answer to decentralization... but in every case of Web3 there is some reliance upon a block chain. If the block chain is limited to only the client and not on any server, therefore unnecessary and worthless, it would then be not centralized.
I get the impression nobody takes the time to actually parse the word decentralization. It only means not centralized, but that applies to absolutely everything in the scheme. Somehow people get this confused and for whatever reason believe if anything is not fully centralized then all of it must be fully decentralized.
In order to achieve actual decentralization with online or web technologies consider this incomplete checklist:
* No DNS
* No identity manager
* No shared server. A server is fine so long as you are the only client that can access it as a server or other clients are currently known and prior authenticated (a peer).
* No root certificate or certificate authority or CRL.
* No blockchain
* No shared database or other shared services
Otherwise claims of decentralization are probably just scams to pilfer your data, steal your money, or mine crypto remotely using your hardware. Decentralization is still possible as I have proven it in a personal application of mine, but its very complicated and extremely different from how the web works.