unless you happen to have one of those Monster 100Gig hard drives, you tend to worry about space like I do. It tends to fill up quite fast downloading Linux ISO images, Delphi and Kylix trials, VisualWorks and Squeak, and other things that fill up a 10Gig hard drive really fast.
So having 20 3Meg files verses 20 16Meg files can really make a difference.