We mustn't be complacent about ActivityPub though - as I see it there are very few protocols which are genuinely open, to the extent that they couldn't be easily captured by a sufficiently well funded motivated party. Those which are (HTTP, email, JSON, etc.) have been widely used for a long time, so there's a lot more work to do.

The same considerations should be honestly made for the #ActivityPub fediverse as well. So we may address them in time. Not all is well. I am writing a blog post on open standards divergence and increasing unattractiveness of an ecosystem that hems itself into a straitjacket of narrow application areas, by the protocol decay we allow to fester. Combined with inadequate work methods to reconcile the tech debt that this incurs. We must go "back to standards" or have an ecosystem based on enabling technologies that are increasingly unattractive to adopt.