[randomAccess]

Having said all of that, if I could determine an exiftool command that would take IPTC information from every .tif file in a directory and put it in every matching-named .jpg file in the same (or another) directory, that would be a decent workaround (export from development tool (in my case, RawTherapee) into 16-bit .tiff, bulk PP, export to final .jpg, re-tag from .tiffs). I am sure it is possible, but for the life of me can't figure it out.