A format consisting of newline-terminated records, each containing comma-separated JSON strings would be superior to CSV.

It could use backslash escapes to denote control characters and Unicode points.

Everyone would agree exactly on what the format is, in contrast to the zoo of CSV variants.

It wouldn't have pitfalls in it, like spaces that defeat quotes

  RFC CSV         JSON strings
  a,"b c"         "a", "b c"
  a, "b c"        "a", " \" b c\""

oops; add an innocuous-looking space, and the quotes are now literal.