Still in Alpha phase, IMO, but has potential. It enables organizing a set of notes, thoughts, documents in horizontal, hierarchical, and tangential ways which is sort of how I think anyway. Many of the little features are still in "template" form, and it has a date of 2019, so I'm guessing it just didn't get enough marketing and adoption to justify continued work. Fully fleshed, this could become something, especially if there was a way to embed in larger apps and mobile apps (I have some ideas where I could use it in a larger context). I hope Hatem gets the bug to refresh this and take it further.