[jscheel]

For repeating objects of the same structure, yaml will still require each key on each object, whereas this is a hybrid with csv, so it defines the keys once.

[3cats-in-a-coat]

No one forces us to use objects in JSON with repeated keys you know.

[makapuf]

Indeed a

    {"header": ["some","column","names"], "values": [[1,2,3],[4,5,6],...]}

could fit.

[jscheel]

For sure, but most people aren't thinking intentionally about what they are dumping into their context either ;)