Answer:   First things first: Your question is formed with incorrect assumptions.
1. The various EDI messaging formats are modern and up-to-date.
2. XML, HTML, and similar message formats are also used alongside the various standardized EDI messages to provide human readable reports.
3. XML, customized web services, and so on, are often used in EDI for non-human readable documents as well, but they’re generally focused on specific one-off or low volume needs. In addition, SOAP, web services, and the like are regularly used for file transmission.
4. XMLs are used in back-end systems to parse the files we receive.