[joosters]

Why? How could it be more useful? HTTP byte ranges are incredibly flexible, since you one request can specify many byte ranges at once (it's almost too flexible, since a dumb server can easily be overwhelmed by a maliciously complicated request)

It handles the basic case of fetching the remainder of an interrupted download, and can also support partial downloads e.g. for supporting a video stream with the user jumping to different places in the movie.