Given the recent introduction of Meta Platforms and it largely doing business as Meta, it seems reasonable to change the wgSitename (and any other related settings) for Meta-Wiki from "Meta" to "Meta-Wiki".
We should not decide to rename a project in the settings so lightly - meta wiki predates facebook's renaming and I don't think it has been causing confusion. Marked as blocked on community consensus pending onwiki discussion
Everyone already calls it Meta-Wiki. Its main page says "Meta-Wiki" in big bold text, and it has since 2004. When you receive a notification on it, it says it's from "Meta-Wiki".
You should definitely hold this discussion on the Meta-Wiki though, instead of in our little cabal here, where most people never even visit the wiki ;)
I have never seen anything other than the Main Page refer to it as "Meta-Wiki", and every user I have talked to has called it "meta" as it should be.
Allow me to repeat: You should definitely hold this discussion on the Meta-Wiki though. Please read before adding further comments that don't add anything new.