There is more then just answers.
For example, GPT could automatically handle flagged posts, and even take into account previous posts.
It can correct spelling errors and typos.
It can help with title suggestions/related topic suggestions.
Something useful that comes to mind is a feature to fact/double-check a post with GPT. Some button with a predefined prompt “check if the information in this post is correct”.
That’s just a few examples that came into mind.