Despite rumours, #XML, #invisibleXML ( #iXML) #XSLT, #XQuery all very much alive. They solve real problems and meet people’s needs.
native XSLT in the browser might go away. So applications like https://wendellpiez.github.io/PellucidLiterature/Amsel/amsel.scholia.xmll might stop working (made by Wendell Piez) which is sad but won’t affect large corporations and their revenue.
There is still no standard way to mark up a poem in HTML. No business case for it. But you can do it in XML with the #TEI.