Composability is good feature. Lots of existing use cases that are silos at this point. E.g. imdb for movies, goodreads for books etc. 

Some are standardised and probably all of them have some sort of OG url source around which things can be composed of.

RSS is good also for podcasts and other decantralised web purposes where it was originally created for but got sidetracked by web 2.0 centralisation.

In Romero’s article you can replace the blockchain with Nostr notes. And his solution was to use blockchain (with Farcaster which is a decent implementation) but the premise is valid. How to build a new social network and to gain traction with existing services, protocols and technologies.