I'm talking about business to business transactions, as in automated transactions on VANs and similar data interchanges. The industry doesn't really use XLSX o

I'm talking about business to business transactions, as in automated transactions on VANs and similar data interchanges. The industry doesn't really use XLSX or XLS because they're unreliable to parse without Microsoft's Office libraries which require Windows licenses, and the two formats have a huge amount of overhead compared to XML formats and CSV (which costs money on VANs). This is a space where plain text files and binary is still king. Formats like EDI are still massive. In many ways CSV and XML are the new kids on the block. Only end users are sending Excel formatted files (and PDFs) to one another.