2 Answers
New Answerhttps://www.sololearn.com/Discuss/301486/what-are-the-advantages-of-creating-web-pages-with-xml-instead-of-html https://www.sololearn.com/Discuss/207080/what-is-the-purpose-of-xml https://www.sololearn.com/Discuss/98627/why-we-use-xml https://www.sololearn.com/Discuss/338220/when-to-use-xml-instead-of-json-for-data
Yes, it is very useful, mainly to interchange information between machines (i.e. automated processes implemented by programs). Some payment files, connecting banks and enterprises, are composed in XML, for example SEPA transfers.