Thanks for the video. Still I am not sure why you need a graph database here, everything can be done with hyper-linked md-files, optionally enriched with metada

Thanks for the video. Still I am not sure why you need a graph database here, everything can be done with hyper-linked md-files, optionally enriched with metadata (front matter). I am aware that a graph database is more elegant but again, does it justify its costs?