As far as I understand, you can edit a post 10 times before it becomes a wiki.
Would it be beneficial to display the remaining edits to the user?
Maybe something like this:
Or maybe on the "edit revisions" page:
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That wouldn't be particularly helpful, no. The wikification or nonwikification of a question should not have any relation to whether an edit should or should not be done. If a question needs to be improved, it should be improved, and if that means it becomes CW, so be it. Converting to community wiki isn't a punishment; it's simply acknowledging that a question has had many changes and should be considered more of a collaboration than a single user's work.