Also I really don't like the hyphen notation... This is very unreadable to me:
- a
- b: c
- - d - - "hello"
YAML expanded: -
- "hello"
JSON (typical formatting): [
[
"hello"
]
]
And EDN for good measure: [["hello"]]
I know which one I prefer :) Silly example perhaps, but once you have X lists nested in Y lists, it does become a lot easier to see why some prefer a bit more visually hierarchically stronger syntaxes