I've mentioned here and there that we used Obsidian, but never showed the Obsidian graph yet, to really show how much it's used!
Here's the key to the image. Yellow are notes related to our system, and light blue is journaling (this one is so inter-connected as we started journaling in Obsidian in 2023. Later on, we added some paper journals to the vault too, but haven't finished the digital migration yet).
Then, every other color on the graph is pretty much different worldbuilding projects I've made. The few, uncolored, dark gray notes on the right side are fanon notes.
This of course, doesn't include academic files, genealogy, or poetry files, as I hide those from the main graph, having not used those files in a while. Just thought this might be interesting to share!