Creates enormous files with thousands of objects that are not needed (empty squares etc). You can see the objects if you rubber band around a few paragraphs for instance, instead of just the few paragraphs being selected, around a hundred objects are selected, all of which are superfluous. Wasting lots of space and it also makes it difficult to select the text because you always end up selecting some empty object close to the text ! Becomes annoying after a while.
Unfortunately this makes it very memory hungry also as it's generating the PDF, or even as it's being viewed in a viewer.