My usage of YAML has been limited. For the times I have used it (kubenetes, docker compose, other things, etc) -- I don't get what it so special about it.

It just seems reinventing the wheel again and again.

I am not suggesting JSON is perfect, either. However I do prefer it to YAML (and XML) by a mile.

It's a shame s-expressions never taken off.

  (select (id name)
    (:from users)
    (:where (= name "Peter")))

Or

  (orders
    (order
      (id 1)
      (code "aa1")
      (qty 32)))

I know - its a sample, but you get it. :-)