About 7 years ago. We had XML data that needed putting in an Elastic search index. XSLT was a perfect match for doing the transform.
Also used it for pdf report generation a good 10+ years ago. Data was in XML format, used XSLT to format the PDF. Again a perfect match.
For all the complaints about XML and it slowly disappearing from use I wish for specific things people would still use it today instead of automatically discarding it as dated technology.
At the weekend I was setting up an Envoy proxy. I'm not saying it should be configured with XML but I was thinking why the hell is it using YAML for complex config which made it hard to write, read, parse etc and how is YAML seen as better than XML when XML would of made the config much easier with a schema than the resulting YAML.