Why keep XSLT if the huge majority of devs use the HTML5+CSS+Javascript combo? Why pump money on a standard which will not be used? Are XML technologies better

Why keep XSLT if the huge majority of devs use the HTML5+CSS+Javascript combo? Why pump money on a standard which will not be used? Are XML technologies better or safer? Probably. However practice sets the standards. Is it a good thing? It remains to be seen. Personally I am not satisfied with the "Web" experience. I find it unsafe, privacy disrespecting, slow and non-standards compliant.