Old CSV files bring no stigma.

There is no CSV specification. That does bring opprobrium. RFC4180 is from 2005, long after Unicode and XML, so people should have known better. The absence of a standard points to disagreement, perhaps commercial disagreement, but IETF should be independent, is it not?

That failure to standardize encoding, and other issues (headers, etc.), has wasted an enormous amount of time for many creative hackers, who could have been producing value, rather than banging their head against a vague assembly of pseudo-spec-illusions. Me included, sadly.