Re: Failed Premise
>A quick look around my home revealed just two items that were made by subtractive processes,
Um, what are you wearing, LeeE? (Oh er!) Most clothing is made by cutting shapes from a woven rectangular sheet.
Okay, I think I see the root of this misunderstanding (not your fault) - yes, most products are made by adding parts together, but many, many component parts are made by removing material - including some parts from all of the examples you listed.
Subtractive processes include stamping shapes out of sheet metal (often combined with bending the metal in the same operation). Think of the metal chassis in old desktop PCs, car panels, cutlery, metal bowls, the tops of disposable cigarette lighters, coins, that sort of thing.
Then we have a lot of subtractive processing of wood, for furniture - of which there will probably be a fair bit in your house. Turning, routing, milling, sanding, drilling, planing etc.
I'd be hesitant to hazard a guess of percentage use of subtractive, moulded, additive processes used in everyday objects around us. If you were to say that most products that pass through our houses in the course of a year are moulded (food containers and other packaging) I'd say yes, that's plausible.
Really though, 'Additive Manufacturing' is really just a convenient umbrella term for a range of process, because 'Rapid Prototyping' and '3D Printing' are often too narrow or inaccurate.