Did you actually read the conclusion at the end of the article?
"Of course, we can't conclude that you should never export to CSV. If your users are just going to try to find the quickest way to turn your data into CSV anyway, there's no reason why you shouldn't deliver that. But it's a super fragile file format to use for anything serious like data integration between systems, so stick with something that at the very least has a schema and is more efficient to work with."
"Of course, we can't conclude that you should never export to CSV. If your users are just going to try to find the quickest way to turn your data into CSV anyway, there's no reason why you shouldn't deliver that. But it's a super fragile file format to use for anything serious like data integration between systems, so stick with something that at the very least has a schema and is more efficient to work with."