I voted yes, because I think Discourse should do something in this space. My preference would be for a local note taking app that synced with a shared Discourse instance.
For my purposes, notes should be saved locally as markdown files, editable with Vim, and easily synced with both Github and Discourse.
I roughed out an Obsidian/Discourse CLI app last year. It works well enough for a first attempt. I like Obsidian’s use of the file system as the source of truth, but if I was doing it again I leave Obsidian out of the equation and use an SQLite database to save local notes. (I’d also use Go instead of Ruby for the app, just to make it easier for people to install.)