@cmdrmoto @erlend No, DID 1.0 specification doesn't require central directories. Many DID methods depend on some kind of registry, but I think in most cases it is based on distributed ledger technology aka blockchain, so when developers make claims about decentralization, they are not completely untrue.
did:plc is not like that, it is literally a single server, and I have no idea why Bluesky team uses the term "DID". Fake-it-until-you-make-it, I guess.