Yes. Actually I made a mistake. It's not one of the main reasons, it's the ONLY reason why I support Blu-ray. Because they are almost the same and I'm not an audio fanatic! Maybe you don't have many DVDs, but when you start hitting the 1000 number, space becomes a major concern, hence the...
So 5 makes it 150 GB. This is one of the main reasons why I support BD, because it would have been 3 discs with BD. Taking less space is a major concern.