Good point, but I think we're talking about throwing away a $25 amplifier when the $50 computer is obsolete. And if the computer is essentially "just" a wireless audio player I'd imagine you can get a solid 5 years out of it without any problem - i.e. it can still run Siri, because the brains are in the cloud.

Physically mounting a computer in your $20,000+ 10-year lifespan car when it is totally outclassed by the phone most people carry in their pocket and replace every year or two... I agree that is insanity!