@strypey Agreed about knowing history and stopping folks from rewriting it. The WP page is unfortunate, and I also see a lot of attempted rewriting inflating some people's roles and erasing others. Also I rarely see people talk about how long-standing the tension in the fediverse and its precursors is between taking an indie approach and attempting to go the traditional big tech route (StatusNet's early VC funding, DIaspora joining YCombinator).
Anyhow I agree that starting in 2017-8, "The Fediverse" has generally roughly meant "everything that connects over ActivityPub or to something that does." By that definition, Threads, Wordpress, Medium, and Flipboard are are all part of "the fediverse" ... and so are Bluesky and Nostr.
With Threads, I agree that it's an attempt to appropriate the goodwill built around "the fediverse", "openness", and the promise of interoperability and data portabiilty at some point in the future. And many high-profile fediverse influencers have welcomed that embrace!
With Blueksy and Nostr, I don't think their backers are trying to appropriate anything with ActivityPub ... in fact, they define themselves in opposition to it. Realistically though, Bluesky's currently more closely connected to the fediverse than Threads, and shares more of the values: just like StatusNet, it's a venture-backed company based around open-source software. So it's not surprising that the press is using the term "the fediverse" to incorporate all of them.