While done in the framing of Reddit, this general pattern is the one that is generally seen in the IndieWeb community with their online chat and wiki.

Chat rooms + wiki = conversational ratchet for community goals

https://jamesg.blog/2022/12/30/mediawiki-sparkline/

https://webmention.io/api/mentions.jf2?target=https://indieweb.org

Link for mentions of the IndieWeb wiki. Ought to dump this into into Fluffy's webmention.js (https://github.com/PlaidWeb/webmention.js/) to provide a better experience.

Reply to Nick Milo:

Ward Cunningham may have been using a similar UI prior to it for other projects, but he unveiled the Smallest Federated Wiki at IndieWeb Camp 2011 in late June: https://indieweb.org/2011/Smallest_Federated_Wiki. I don't have a receipt to prove it, but I have to suspect that Andy's version was certainly influenced by Cunningham's work.

Mike Caulfield, subsequent author of the influential The Garden and the Stream: a Technopastoral, Iterated on the Smallest Federated Wiki and created a WordPress-based plugin shortly thereafter called Wikity that used some of the card-based UI that Obsidian comes with out of the box.

Both had some early influence on the UI-based research that the IndieWeb space has done since. For those interested, there's also a sub-group within it focusing on digital gardens, commonplace books, Zettelkasten, etc. that can be found here: https://indieweb.org/commonplace_book