I agree that this is likely to flatten out the depth of comments I come here for. It's also hard to get a brief that is tailored to the subset of posts you might actually be interested in.
The approach I tried was to rely mainly on what comments I've upvoted, have the AI look at those comments and gather context from the article/link and the parent comment chain, then give me a "here's what you learned yesterday" brief.
I had plans to add some memory to mention related things from recent weeks. Relying mainly on being able to visually code all this with n8n, and never quite got it working.