Though, considering how much information tends to get centralized in these comments, I think the wiki-like direction is the way to go. (I know anyone can edit MDN, but it's via github PRs rather than being able to make quick edits on the site.)
I don’t see a problem with the github PR workflow for updating documentation. Yes, it’s one step more, but it’s nothing special when you use github’s online editor.
PS: MDN and MSDN are my favorite documentation sites.
https://apidock.com/ruby/String/split
Though, considering how much information tends to get centralized in these comments, I think the wiki-like direction is the way to go. (I know anyone can edit MDN, but it's via github PRs rather than being able to make quick edits on the site.)