So one issue with the summaries is that it’s somewhat subjective and requires a good deal of work. At first you would think it’s probably best to give the responsibility of summaries to the authors, but that may be asking for a lot. Is it possible to automate these somehow? What I do think is important, is that perhaps we could somehow require a single sentence summary of your post to be included in the summary (to help out whoever is doing the summary), and your post can be referenced for more details if need be. I am a little uncomfortable if we can find a good automated system, so I have a proposal:
Require the author of a response during the RFC discussion to include a concise summary in their post (if they feel that the post is significant enough to be in the summary, as opposed to say, questions for clarifications on someone else post). I feel that this will make the job of summarizing the current status of an RFC significantly easier, and it will make scrolling through the posts significantly easier while trying to keep track of certain topics in the linear structure that GitHub provides.
edit: Clarify post; forgot to include my own one sentence summary! 
Topic: Incorporate clear/concise summaries on some cadence.
Suggestion: Require concise summaries for (most) posts by author of post.