One advantage is I have 5 year old) keynote presentations that keynote refuses to open (tells me file format is too old), and 3 year old PowerPoint slides the n

One advantage is I have 5 year old) keynote presentations that keynote refuses to open (tells me file format is too old), and 3 year old PowerPoint slides the new version messes up the formatting of. I'm slightly more confident my HTML will continue to render right, and at least open!