Comment by nl

Much of DID itself is basically a standardization of the idea behind Keybase, ie, using control of a private key as a marker of identity.

This in itself is a pretty good idea (with some bad usability, but at least technically interesting)

DID falls over because it has a bad interop story, and much of it is based on crypto-based implementations (again, technically interesting but bad usability plus a monetary incentive to go after your details).