[masukomi]

GNU Recutils https://www.gnu.org/software/recutils/

is a good example of an actual database that uses plaintext files in your filesystem.

I can see the argument that doing this with JSON is better (or worse), but regardless, Recutils is an interesting idea that i wish more people knew about. I can imagine a lot of cool things emerging if people would iterate on the idea.

[necrotic_comp]

Recutils is great, but it needs a rewrite, I think.