CSV is ubiqitous. That's a massive advantage. If you argue against using CSV you might make it less ubiquitous. You're never going to make anything as ubiquitou

CSV is ubiqitous. That's a massive advantage. If you argue against using CSV you might make it less ubiquitous. You're never going to make anything as ubiquitous as CSV though and that's amply demonsrated by the fact that when you look at alternatives you immediately name 7 different things. And some of the advantages aren't even necessarily advantages - a file format storing typed values is a non-trivial consideration when you're thinking about cross-tool support. Pandas is cursed with this even in CSV - there wasn't an optional int so any column with missing values must be float, and floats don't necessarily handle large integers - have fun with your nanoseconds going funny in your nanosecond timestamps stored as optional ints. CSV is ubiqituous because it's not trying to solve difficult problems. The second you try to solve the difficult problems you necessarily fragment your audience.