Bluesky, which uses it, has been opened to federation now, and the standard basically just looks better than ActivityPub. Has anyone heard about a project to make a Lemmy-style "link aggregator" service on it?

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[–] gandolfini_the_grey@lemm.ee 16 points 6 hours ago* (last edited 6 hours ago) (1 children)

See here. Basically, creating a relay for the AT protocol is extremely costly and only possible for big tech companies.

[–] CanadaPlus@lemmy.sdf.org 6 points 5 hours ago* (last edited 4 hours ago)

Thank you!

TL;DR, the relay bit works as a completely connected network topology, and has the associated quadratic growth issues, which renders it, like you said, hard to host.

Also nasty: Direct messages are just not federated.

Other things are or were at the time of writing janky, but nothing else is quite that egregious. The author is working on a separate project, and recommends this idea as a solution for portable identity on ActivityPub; here's what "object capability" means in the context.