@Dominic says: In patchworld, multiple identities is useful for like, parody or troll accounts, and there hasn't been much demand for that yet.

rather than parody accounts, i think first-class support multiple identities are useful to everyone who has multiple identities from using multiple devices or everyone who has lost their key and had to create a new identity. or maybe i'm referring to "multi-key identity" (a system to allow multiple keys be grouped into a single identifier, and provide support for graceful key revocation) and this is different from this situation.