Have just finished ranking and key wording some 17k images, many are there to support my writing military history articles.
A bit of a grind to do it, and was complicated by my duplicating many/most of the images in error during some folder admin so had to delete and rename etc.
All done now and I can search the images in several ways that were impossible when I had only a folder structure.
PM6+ has also stood up well to my lack of familiarity with the program - I am one very happy user!