I use some aspects of the LATCH Information Architecture in obsidian. However LATCH neglects the point of obsidian which is to link knowledge together. The H for Hierarchy is supposed to not only cover, for example, how important a note is or how long it is or how many times it has been edited, but also it’s closeness to other notes.
The closeness of notes only makes sense as a hierarchy locally. If you are on note A, then the closeness of note B is the depth of the link tree that B is.