Comment by duped

> JSON is there for human to read a record of data by group.

That's what tree is for

> I think it is only good to use directory as data table to store JSON data files, but not for JSON data properties.

I see that as no better than one big JSON file or a normal NoSQL database.

If you're really fancy then the whole DB is just a VFS and those JSON files aren't real files, just a serialized form of the DB.