Oh yeah, I'm definitely an archivist. I'm between RSs readers right now, trying to find a screen reader accessible web-based one. I'll have to give this a try when I do. The feed says it isn't valid though, can you fix that?
- https://feedly.com
- https://www.inoreader.com
- https://www.newsblur.com
- Feedbro, a Firefox extension
- https://theoldreader.com (mentioned by you)
- elfeed (an Emacs package, so not web-based)