I don't understand why people think JSON is a bad format for humans. The ability to write invalid JSON is very hard, and doing so will result in JSON parse errors. Take YAML on the other hand -- simply omitting a dash can result in unintended consequences that will parse just fine:

  some_collection:
    - first_entry

vs

  some_collection:
      first_entry

When you're staring at a non-trivial YAML file, it's very hard to spot these errors, and you'll potentially get some very weird behavior in whatever is depending on the config.