I know they must be here somewhere, but where do I find release notes for intel fortran versions to see if there is any reason we care about to update from version 17.1?
It used to be https://software.intel.com/en-us/articles/intel-composer-release-notes-by-version , but the list from that page hasn't been updated since the original release. https://software.intel.com/en-us/articles/intel-parallel-studio-xe-release-notes-and-new-features is a new page with updates. You can also click the Release Notes link from the download page at registrationcenter.intel.com
Don't bother looking for lists of bugs fixed.