I agree. I'm not sure what the point would be, besides just for the hell of it. Now I could see some reasoning if one were to try and build their own dual processor or dual logic board macine. Or maybe an extreme media machine with more crammed in it than can fit in a normal case.
How 'bout... to have two optical drives? Or more hard drives than can fit in the Mac's case? Or just to have something that looks 'better' than the Mac case (beauty being in the eye of the beholder)?
And then there's the ultimate reason: coz some guys just like to tinker.
That's basically a Mac clone. I have several of the PowerComputing towers and they are great for adding stuff. It's a basic PC case that holds 4 opticals and room for 4 regular height drives. Plus you could mount 2 or 3 drives on the case floor.
It would be like an easy bake oven inside and could probably bake a cake in it.....
One of mine has CD-ROM, CD-RW, DVD, Jaz, Zip, and currently only one hard drive inside because I have an external SCSI 4 drive Data Silo. But I could add a DVD-R and 2 more small hard drives without a problem.
I like to tinker........