An interesting thought: coffee is probably much easier to make than arbitrary 3D objects made of various materials. Yet coffee makers have not become as ubiquitous as CD burners.
What I want to know is why.
What I want to know is why.
You can imagine there being a machine that does all the cleaning, maintenance, etc. with a push of a button. It's just not as affordable as machines that burn 650 MB of audio data onto optical disks.
The cost of the copper alone in some of those coffee makers is easily a couple hundred dollars. You also can't mix in another metal with a high specific head like aluminum in places to offset the cost because the presence of both copper and aluminum in the same water path will cause the two to react with one another.