Name one started after 2022, with at least a modicum of success.
After a quick search I stumbled upon Wikifunctions (2023), but do Wikimedia projects that are not Wikipedia count? A bit more controversial would be Anna's Archive (2022).
We have to think about the needs too. There was a need for an online encyclopedia, Wikipedia took it. What need do we have now that is currently unanswered and can be answered by a collaborative effort similar to Wikipedia?
Also, open source projects, so many come out every year that it is hard to count.
I became a Wikipedia editor not long after the 2nd version of the site, before they even had logins, IIRC.
I was banned from the site probably 7 years ago or so by a troll who collaborated with the admins. The review "process" was more like The Trial and the ban was quite terrible, because not only did they install some deep cookie in the browser, but they permabanned the IP address.
Wikipedia is gone. Whatever it even was, it is not now.
The title evokes a romantic sense of wikipedia as a well governed, neutral egalitarian multicultural collaboration. But anyone who has been marginalized by the cabal knows it was not most of those things.
"Whatever it was[, which was really was really not all that,] it is not [even] now."
We dont use "deep" cookies, just normal cookies. If memory serves, 7 years ago Wikipedia didn't use cookies at all in the block process, it was purely ip based back at that point.
I get everything about slop/spam/etc. but deciding a page about a small band in SmallTown Canada isn't "worthy" of wiki is silly beans. That's the whole point of a collaborative, anyone can contribute wiki. Having people decide what "makes the cut" or not is silly.
They could have gone with a "edu" / "core" wiki that gets to include only certain articles, and the rest are "community" or something, but literally removing articles for anything other than quality/sources/spam is not what wiki started as. And it's not what I donated for, but that's another can of worms...
They provided an email address to send a message for appeal to the board, which I didn't bother.
Spirit is not sufficient. I can start a new project with the same spirit and a user base of one.
Scale is part of what makes Wikipedia. What projects are similar in spirit and scale?
If we get to the more general idea of "can humans collaborate in the same way they collaborated to make Wikipedia". I see no reason why not. Collaborative projects similar in spirit to Wikipedia pop up all the time.