I'm pleased to hear that they're moving. Fandom's had a monopoly on the community-created wiki space for far too long, and it's had a dire effect on the usability of so many wikis. It's like they're trying to make their site everything but a easily usable resource for community wikis.
On a related note, I highly recommend the "Indie Wiki Buddy" extension for Chrome and Firefox. When non-Fandom/Fextralife wikis are available, it'll direct you to those instead; and when they're not, it'll allow you to view the Fandom wiki through a much more usable mirror.
I hope the Fallout and Final Fantasy wikies also migrate out from fandom. Back when they were wikia, they were a lot better. It feels that the search function on fandom is so bad that half the time you're better off going on google and slapping your search there instead.
I make it a point to actively avoid Fandom. They're fucking horrible. Luckily for the type of games I'm interested in there's alternatives available (for eg doomwiki, halopedia, UESP)
Just whatever you do, do not use Google docs to share information that belongs to a wiki. That's is by far the most annoying option and 100 times worse than just having to deal with a fandom wiki.
The RuneScape wikis did this several years ago, might even be a decade at this point. The actual developer studio, Jagex, helps pay to keep them online and independent because of how damn good they are and how useful it is for everyone, including developers, to reference.
Microsoft (or Mojang? I don't know anymore) would be well served to do the same here honestly.
I'm an editor for a community wiki that moved off fandom a few years ago to Mireheze. When the recent discussion about Miraheze shutting down happened I briefly inquired about where we would migrate to, expressing my hope to not return to fandom, and was quite thouroghly assured that fandom is not somewhere that would even be considered returning to. I don't think I've had a single positive experience on a fandom wiki ever, or at least not in over 8 years, with issues ranging from intrusive ads, to the comment section pop in making scrolling inconsistent, to even something as simple as it universally looking fucking ugly, I can't wait for people to leave and am actively cheering on its slow death as a website.
I am an admin on another wiki that used to be on Gamepedia before the Fandom buyout. We forked immediately. I have also been self hosting a wiki for another game since early 2017. Completely worth it. Fandom has always had terrible user experience, and frankly they do not care about their users at all. Maybe their community-level staff do, but definitely not the higher ups. I've chatted with them directly when we were planning to fork. They're only in it for the money, not for the good of the editors or readers. They make ridiculous changes that are great for advertisers but completely subvert the user experience and actual content on the page. They've also let go a lot of their staff for nonsensical reasons. I really hope the Minecraft wiki goes through with the fork, and that more and more wikis follow. It's absurd how much of a monopoly they have, given how awful their service is. I for one will be happy to visit the Minecraft wiki again, as someone who plays occasionally, but not often enough to be keeping tabs on all the new features and updates. But I boycott Fandom wikis on principle so I haven't been there in years.
As a matter of fact, there are opportunities here for other companies that don't have general wikis for gamers to create a better hosting service. They have not done this and I don't understand why. Steam could easily do this, I think. Just imagine Steam creating a wiki for games, with links to the best guides, etc. It would be a modern version of GameFaqs (which still exists) but improved. When I do a search on a game and I get Fandom in my results, I tend to skip over it and look for something better without ad bullshit. I would think that other gamers tend to do the same thing. I mean, it's that bad, even for a user without a registered account (like me).
I really hope that they do, Fandom is annoying as heck to use with the constant advertising and unnecessary sidebar that pops up a big window on mouseover etc. In fact, I hope all fandom wikis leave Fandom and migrate elsewhere.
Runescape's fandom wiki has long been abandoned, and the SEO makes it horrible to constantly have to scroll passed it when looking for the official wiki results. I would vote that they get a time machine and never use Fandom in the first place. Barring that, I'm torn between my sticking with Fandom until it gets worse, and just cauterizing the wound and switching to wiki.gg now. wiki.gg has by far the least-intrusive ads (which I only really see on my phone when I somehow get shunted into Chrome).
MediaWiki is great but Git-based wiki are more distributable and easy to back up. A trustworthy platform taking care of infrastructure is all contributers like these look for