[yawnxyz]

I love jsonlines but csvs are way more compact, since you don't have to repeat the column name for every line of data

[sam_perez]

I think the fact that a human can mostly just read csvs is an important part of their adoption, too.

[ianburrell]

You would write JSON arrays without names for tabular data. I don’t know if there is a standard way to do the header, but array of names would work. Or JSON Schema record.