I just happened to have a peek at the current state of the #fediverse page on Wikipedia. At what point did the meaning of "fediverse" expand to describe all the federated social networks, regardless of what protocol they use? Is this now the accepted usage? Do the XMPP social apps count (Movim, Salut-a-Toi)?
https://en.wikipedia.org/wiki/Fediverse
Fediverse - Wikipedia

@strypey

For me, it's if they can federate. Might be more than one fediverse.

@bhaugen "fediverse" originally described only the OStatus apps. The apps federating using Diaspora's protocol set were "The Federation". See Sean's article from a year ago:
https://medium.com/we-distribute/a-quick-guide-to-the-free-network-c069309f334

Usage seems to have drifted since then to being a catch-all term, and I guess I'm just wondering if that's a consensus or if there' anyone who thinks a narrower definition is still useful?

A quick guide to The Free Network - We Distribute - Medium

Today, we dive into two spaces on the federated social web, look at their history and the players behind them, and talk about their potential futures.

We Distribute
@bhaugen I'm leery of creating novel vocab for the run of it, but it seems to me that the fediverse now has many more kinds of activities going in it (image-sharing, music-streaming, video-streaming, link-sharing etc). Each of these activities is like a mini-federation of its own, that needs to be explained to newbies somehow.
@bhaugen for example, there are 2 fediverse apps focusing on image-sharing; PixelFed and Anfora (formerly Zinat). The first one was Quit.im, which was built as a web client for #GNUsocial, so once the AP plug-in for GS is rolled out (hopefully by the end of the year), if Quit.im is still in active development, there will be 3. If #MediaGoblin rolls out AP support there will be 4. Others may emerge. Does this 'image-verse' sub-federation need it own name and identity so users can understand it?
@bhaugen except for MG, these projects are imagine as federated replacements for #SnapChat / #Instagram. But to what degree could they also be replacements for #DataFarms like #Flickr, #DeviantArt, or even #PhotoPin (a #CC image host)? How could a coop like #Stocksy participate? How can all this be explained to newbies?