Let's say there's a question that gets several answers, but I think the question lends itself to being community wiki. Do I have to post at Meta, or is there some more direct way of switching the approach on that page to a single answer under the community wiki format?
As Lambie mentioned in comments, questions can just be converted into Community Wiki by moderators, so you need to flag them or open a Meta post to request it.
Prior to 2014 the CW status was set automatically under some circumstances (a lot of edits by the OP / different users, many answers...) but it was finally changed. There is a relevant reading: this blog post by the community manager who changed this: Putting the Community back in Wiki.
In general I don't think there is any need to convert questions to Community Wiki. We have exactly 46:
- 44 from the translation-golf, which was a decision we made to avoid this game generating reputation to the users (see rules in This is translation-golf! The translation with the least number of characters wins!).
- Are there any words that have opposite regional meanings? an old question, which I myself would see better as not-CW.
- Resources for learning Spanish / Recursos para aprender español a new one that needs to be easily editable by users, no matter how much reputation they have.
So the baseline would be: if a question is going to need a lot of attention by a lot of users and works as a Wiki itself, let's mark it as so. Otherwise, just leave the ownership as is.