XHTML is still alive as the section 13 "The XML syntax" in the "HTML Living Standard" shows us. Moreover XML comes with a host of useful technologies : schemas,

XHTML is still alive as the section 13 "The XML syntax" in the "HTML Living Standard" shows us. Moreover XML comes with a host of useful technologies : schemas, XSLT, XQuery and namespaces. It is quite complex compared to JSON but more powerful when you consider the whole ecosystem. In the end, it depends on the need we have. Quick, small, simple XML is possible and easy.