Unless your end user is a developer, that's a distinctly unfriendly way to treat your users. Did you read the article? The point is that non-developer end users

Unless your end user is a developer, that's a distinctly unfriendly way to treat your users. Did you read the article? The point is that non-developer end users will never use CSV in anything but a spreadsheet, and Excel is the most prominent of those. To give it to them in JSON is, well, just useless.