I don't think that is a good example. With the right prompt an LLM can create a much better and much more useful Thread Summary. Having a summary of a few posts will not be useful by definition. Because there is nothing of substance to summarize. Having a summary of 500 posts can be very useful. A summary would likely only be useful to display after X number of posts,
Keep in mind that the thread summary is just one detail of many parts of this suggestion and that as always XenForo only implements functionality as optional features that you can turn on if you feel it enhances your site or leave off if you don't like it. Nothing is forced upon you.
The main concept of this suggestion is that LLM first creates a summary so it understands the meaning of the the thread. That summary may or may not be visible in a widget. Once the meaning of the thread is clear, then LLM can enhance the thread with various things that the admin may want to activate: better title, snippet, SEO meta tags, thread tags, select the proper forum, proper prefix, create a nice looking thread cover, related content, etc.
The purpose is to enhance threads and make them richer in content and more usable, in line with the preferences of the admin.
Whether or not to display the summary itself is trivial to me. That's really not the main point here.
And I also think that if used in the right way, it would be a major boost to forum SEO if forum threads would get optimized well. i.e. more traffic.
