Late for the response but: JSON naturally encourages data to structural in ways that are often nested. In your example, if there's one or two additional layers

Late for the response but: JSON naturally encourages data to structural in ways that are often nested. In your example, if there's one or two additional layers of context (say, affiliation of the two persons), maintaining a CSV-like layout will be more cumbersome and unnecessary. I don't see many CSV or tabular-like JSON/XML in the wild and they really shouldn't be used that way.