> Does the world need another RSS reader/mousetrap? We already have so many.

And we also have near-universal OPML import/export, so the cost of switching is minimised.

> What is your friend's idea to revolutionize with their new reader?

You don't need a revolution to make your app compelling, you just need to improve on status quo. RSS has a lot of shortcomings, most importantly discoverability.

Here's a simple idea: crowdsourced discovery. Users could opt-in to anonymously share their feed list (whole or parts); keyword-based categorisation could group them into topics; etc. The reader could use an algorithm (haha, we're coming full circle) to suggest interesting topics, feeds, posts. Honestly I'd be interested in something like <https://kagi.com/smallweb/>.

Extra kudos if the dataset is released publicly.