Algolia has already done the search thing, can the Vectara search be 10x better?
What I do find missing from HN is the ability for me to see things that may be of interest to me, but that I may have missed. I like how I get everything in the main feed which is pure popularity, but I don't have the time to go through all posts, and definitely likely miss things I would probably have been interested in.
Though this can be done with collaborative filtering, or other non-AI methods, might this be a decent use case for your AI?