Memory Alpha (primary Star Trek wiki) is another one that was self-hosted and as a user of it I mostly just accepted that sometimes it would be down due to Mediawiki upgrades or traffic reasons or otherwise. They also migrated to Wikia when shared hosting seemed like a better deal than hosting Mediawiki themselves, and now in the "Fandom" age it's just irritating that it is no longer just disconnected shared hosting (which Wikia had briefly promised to Memory Alpha that it would stay independent) and is now such a blatant advertising infested cash grab. I don't directly know who runs that wiki, but I do sometimes wonder (as a user) if they regret the consolidation (and if they have any escape plans).