I think my digital life would be a mess without an RSS feed reader. Because of its existence I do not need to touch Twitter, Reddit, YouTube[1], or any Mastodon instance, for example, as I can just have the updates that interest me from these networks in the comfort of my Feedbin[2] feed.
While Hacker News does not provide an interface that notifies you when someone replies to you, hnrss.org provides an RSS feed for that[3], so I know when I get a reply. I also have a separate feed for Ask HN[4] and Show HN[5], so I never miss anything that may interest me, even if other people do not care about it. Heck, I found this post because it showed up on my feed reader!
As a system administrator, I can use RSS to keep up to date with security issues in Ubuntu Server[6], WordPress[7], and CVEs in general, but also to follow commits in SourceHut repositories[8] and releases for pieces of software I use daily, but do not have repositories for my Linux distribution.
I sure as heck hope it never go away.
[1] In the YouTube case, with RSS, mpv, and youtube-dl, I never even have to see their web interface.
[3] https://hnrss.org/replies?id=${YOURUSERNAME}
[6] https://usn.ubuntu.com/usn/rss.xml
Along the same sentiment, I've taken things further and update my RSS feeds on demand. I use a suite of tools that pull entries[1] using Newsboat[2] and send them over SMTP (with a `sendmail` tool), optionally saving the emails[3] that couldn't be sent to disk.
Combined with a local server[4] relying on NewsAPI[5] that can pull news from sites that don't provide with an RSS feed (AP, RT…), it's a great decentralised and modular setup!
[1] https://github.com/lenormf/newsboat-sendmail [2] https://github.com/newsboat/newsboat [3] https://github.com/lenormf/sendmail-tryqueue [4] https://github.com/lenormf/news2rss [5] https://newsapi.org/