I can confidently say that CSV support is one of those problems that even the brightest computer scientists will be pondering for the decades to come.
Supporting CSVs sounds like an easy problem, but it's not. It's like a whole different complexity type. Time complexity, space complexity, and now, the dreaded subclass between spec complexity and organisational complexity.
You can't just make the users agree which delimiter to use and how quotes are supposed to work. That's nearly impossible. No no no.