I can see many a reason someone might want that type of functionality and it isn't to difficult to impliment. A nice xbmc setup for media only is just one example but one that I imagine quite a few folks might be partial to. Another solution to your "noisy hard drive" issue would be one of the many nand memory devices that emulate ide hard drives. Try a search on google I have seen them in 10,40,128, and 512MB configurations used in things like ATMs.