That's inferior to even csv in any all its forms. It cannot be appended w/o removing the trailing square bracket. It requires column names per each row, you can

That's inferior to even csv in any all its forms. It cannot be appended w/o removing the trailing square bracket. It requires column names per each row, you can't even know how many rows are there w/o parsing. It requires quotes (technical csv allows multiline rows but that's rarely used in practice) json is absolutely horrid for this type of hack-in jobs. Tabular data just not well structure data, easy to cut and paste.