Will your system function without cables? No. So they are components.
Will your amplifier function without a fuse? No. So it's a sub-component.
Will your speakers function without special footers, Yes. So they are tweaks.
Do you consider cables to be a "component" of your system?
Meaning, do you think that cabling (AC/InterConnects/SpeakerWire) should be considered a component that is integral to your system?
I have probably as much money in cabling and fuses as I do in most of my components (if not more).
Please, please, PLEASE don't tell me that cables don't make a difference. I disagree and there's nothing you can say or do that will change my mind, so save it for another thread, please.
I just wondered if you had to recommend a set up to someone (who wanted a nice stereo), would you consider cabling to be essential in your build price and your recommendations? If so, would you consider the cost of the cables to be on par with the cost of a component?