Although, slightly outside of this scope, I cannot say enough good things about YAML. For example, we use it for parameterized test cases that must be passed i

Although, slightly outside of this scope, I cannot say enough good things about YAML. For example, we use it for parameterized test cases that must be passed in code written in various languages. i.e. Python server function does the same thing as client JavaScript function. As for not using JSON, I prefer YAML b/c often times we like to put comments in our test cases. This is really just no doable in JSON (outside of some ugly hacks. e.g. repeated keys (last one wins)).