[kazinator]

Yuck, that RFC 4180 actually quotes Postel's poorly considered "law" and recommends that it be followed. Why have a RFC then. If you're going to be liberal in what you accept, then the RFC is just a suggestion.

Plus it's not just defining CSV but actually a CSV MIME format (what?) and thus insists that since CSV is MIME wire data, it must use CR-LF line breaks, rather than assume that data can be converted to an operating system's text file format, and native line breaks.

You'd think that CSV could be defined without reference to MIME whatsoever, using abstract line breaks; and that it's a no-brainer that since it is text, it can be MIME-encoded as a plain text type.