I've been using bases (in beta) for a month or so for the vault I keep for the notes for each of the (many) D&D/ttrpg campaigns I play in, and it's really made it a ton easier to get an overview of e.g. the many different NPCs we meet and interact with, and the relevant info (name/pronouns/pic/race/class/etc) all in one place.

The Obsidian dev team has been really responsive to feedback from those of us in the beta, and I'd encourage people to look at the changelog to see that in action (e.g. changing the syntax to be more object oriented, smoothing over UI issues, etc)