KimR, I struggled with the same thing as to 'how long to keep the layered format. My latest on it...[LOL] if it is printed...then I let them go. I did a book for my older grandson of his vacation last summer. Once he had the book, I deleted the layered files.
I too was shocked at the amount of space saved. Now, if one using different Tiff settings...golly sometimes the files get huge!
m