Whether you just refer to them, or you continuously edit them. Asking because it’s always fun to hear about other peoples’ use cases and experiences with Obsidian. And because I was thinking about some reference notes I made that I do not actually use for one reason or another, but it boils down to something like this: https://xkcd.com/1205/. I miscalculated how much pain or time making the reference resource would save me. That note gets 0 visits. Meanwhile, other notes I made get near-daily references, and I feel so glad that I made that note because it makes my life a little easier or better.
I have a few evergreen notes that I update as needed, but the most frequent one is simply a list of what books I have on preorder and when they’re expected to ship. I have a book buying problem.
Otherwise most of my notes don’t get referenced often because they’re stores of knowledge, not items related to active projects. I have several reference docs for fiction writing and DnD that I reference and update often because I work on those projects often, but my note on the Zanclean Flood is just obviously not going to come up almost ever. But writing is how I learn, so I wrote about it 🤷