[adra]

Erm, maybe file based? JSON is the king if you count exchanges worldwide a sec. Maybe no 2 is form-data which is basically email multipart, and if course there's email as a format. Very common =)

[hermitcrab]

I meant file-based.

[devmor]

I honestly wonder if JSON is king. I used to think so until I started working in fintech. XML is unfortunately everywhere.

[arcfour]

JSON: because XML is too hard.

Developers: hey, let's hack everything XML had back onto JSON except worse and non-standardized. Because it turns out you need those things sometimes!

[hermitcrab]

JSON isn't great for tabular data. And an awful lot of data is tabular.