We have a lot of answers and questions which for various reasons became community wiki over the years (variety of reasons).
From here:
Guidelines for un-Wikiing
And that's still the case: generally-speaking, moderators will cheerfully remove CW status on posts as long as...
They don't appear to be actual community projects (lots of substantive edits from multiple editors maintaining the post over time).
They're not part of some old discussion / poll / GTKY question that was only allowed under the old rules for squishy-subjective posts.
You weren't clearly abusing the system by making dozens of worthless edits merely to bump the thread.
...In other words, those cases where the system clearly got it wrong and converted the post to CW unnecessarily. Which... Is a lot of them.
Are there questions/answers from there people feel should be unwikied or are unfairly wiki'ied?
Note: it's probably easiest and best to use answers for this to vote on/etc.