@steve @nick @stereo is (or should) #activitypub be considered really "frozen"?
The #bluesky/ #atproto experience seems to show that alternate (yet similar) designs are workable (the caveat is because as far as i know there is no fully developed federating constellation based on atproto).
Hiding besides a standard might be a losing proposition if there are real learnings that are ignored. Everything evolves and thinking of ActivityPub 2.0 or 3.0 is normal.