Let's say I wanted 100% reliable music listening. To do this, I buy a million of the original 30GB Zune media players, create a perfect failover system, so that

Let's say I wanted 100% reliable music listening. To do this, I buy a million of the original 30GB Zune media players, create a perfect failover system, so that if the sound from one of those stops for whatever reason (hardware, software, cosmic rays, etc), it'll switch to another one. I even move these Zunes all across the world, with AC provided, and multiple network links linking all of them, with satellite link backups between them. Then December 31, 2008 rolls around, and a tiny firmware bug knocks out all of them simultaneously for 24 hours. Oops. Not all failures are independent events.