@nate @nate Some aspects of it are still being developed, but overall I think it is a proven technology. Forte is a project from the same person who invented nomadic identity and built Streams, Hubzilla, Friendica etc.
Nomadic identity may never become a part of the official spec because ActivityPub was published in 2018 and haven't received any updates since then. However, ActivityPub now evolves through FEPs (Fediverse Enhancement Proposals), and nomadic identity specs are published as FEPs (for example, FEP-ef61).