How common is DVD9?

I have just recently gotten into backing up my dvds, and i have noticed that most of them seem to be dvd9. Almost every dvd that I own from a major production company is on dvd9. Is this the general trend for most movies?

Yes most all commercial movies are dvd9 but there are a lot of programs that will shrink them to dvd5 with minimal loss of quality.

I’d start by blanking Previews then the FBI BS, etc. then disable any fake audio tracks, eg. French for The Simpsons, until you are down to the stuff you actually want using DVD ReMake Pro then save it. Next, recompress it using another program like DVD Rebuilder Pro.