There are two experiments AFAIK: one done by Steph Ango (Obsidian CEO) and another one by me. I didn't publish mine because I thought no one would like it, but I'm happy to do it if more people express interest.

https://x.com/rafalpast/status/1693961256879726684?s=20

PS I use Ensō with Obsidian for my morning notes: https://untested.sonnet.io/Stream+of+Consciousness+Morning+N...