XSLT is the perfect example of a technology that I might consider using today if I can get an LLM to do all of the work for me - see also jq and AppleScript which I use frequently now after avoiding them both for years.
I just tried "Give me options for converting XML to JSON" and XSLT was 5th out of the 6 it gave me:
https://chat.openai.com/share/85aa3e93-f557-426c-b0ce-f3bce7...