@George Cutrell 

Please see below for release notes,

https://www.servicenow.com/docs/bundle/xanadu-release-notes/page/release-notes/analytics-intelligenc...

I believe they have updated documentation that goes back to Vancouver release that Core UI reporting is deprecated maybe as part of patch updates,

https://www.servicenow.com/docs/bundle/vancouver-release-notes/page/release-notes/summary/rn-summary...

If this helped to answer your query, please mark it helpful & accept the solution.

Thanks,

Bhuvan