Does it reflect notebooks/folder structure also in the filesystem? That's exactly what I need from a PKM tool: that not only the files but also the structure of the notebooks is reflected in the filesystem so I can have interoperability. This way I can decide to work with Obsidian, EagleFiler, Notebooks.app or DEVONthink while also having the possiblity of using the regular Finder to work with my files.