A small annoyance of Preview is that the PDFs it displays don't render JPEG2000 images correctly. I found this out due to the project we're on. Some of the PDFs

A small annoyance of Preview is that the PDFs it displays don't render JPEG2000 images correctly. I found this out due to the project we're on. Some of the PDFs were generated about 20 years ago with JPEG2000 images in them. Acrobat Reader does display them correctly. I can't stand Acrobat Reader, but in this one case it's a better PDF viewer than Mac Preview.