@jdp23 +1 on all that.
So the question is do we put in the effort to clarify/define the term "Fediverse" to mean all that, or do we find a new term to refer to that.
I'm in the former camp, but can be convinced. My main point is: we have to be able to refer to that particular slice of the broader AcivityPub-speaking network. And then we need to defend that term, because there definitely will be attempts to dilute it into meaniglessness.