That does look cool. Would this work fine if presented with my Obsidian "vault", eg a folder full of markdown files? Looks like both apps like to operate on the same data.
I've used obsidian with nb before but you can't just open nb inside your vault and have it immediately work. nb uses .index files at the root of each directory to know what to display in the cli (I assume so it doesn't have to do a ton of I/O operations). You'd probably need to spend a bit of time understanding that stuff so you can write up a script or something to coordinate between the two. I ultimately just ditched obsidian and went with my afore mentioned apple notes/nb hybrid approach.