User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-45057330-20201201083241/@comment-1038387-20201201115320

There isn't much "something similar" to go to. Gamepedia was limited in its scope and now in the fold. Wikispaces and Wetpaint are gone. Shoutwiki and Miraheze never even got close in size, viewers and SEO. There are paid services that score better than them. And both of those are on current MediaWiki and do not have the customizations of Legacy. I don't know whether their staff listens, because they don't engage with communities.

The "market" is pretty one sided. Fandom's biggest competitor is Google.