We tend to think about RSS in terms of web sites and web applications and what gets over looked is how you can use it personally. For example, I send items from FeedLand to Radio3 to add to my linkblog. I have an IFTTT applet monitoring the linkblog RSS file that takes new items and adds them to Pocket, which retrieves and stores the full article content that I read later.
As I read articles in Pocket I might highlight parts that I want to remember. The highlights in Pocket are grabbed by Readwise, where I can read through them and have them presented to me daily. Finally, Readwise exports the article highlights to Roam and Evernote.
In this example RSS is the backbone to my personal knowledge collection and refinement. It glues together for me hundreds of web sites and six applications.