Pardon my ignorance, but is that reason because of higher quality output, smaller file, or better for posting on the web?
I myself am not real concerned about posting on the web, most of what I do I put on a DVD. I suppose it would be good to post some things online now and then though.
"The Sage as an Astronomer: If you still see the stars as something above you, you lack the eye of knowledge." Friedrich Nietzsche