Where I work, the sparkys worry about Type I cable. They figure ampacity, debate the merits of going cable tray or duct bank, they do trade-off studies of voltage vs. transformers vs. circular mils and worry if direct-buried will deteriorate due to inadequate jacketing.

Then there's Type II cable. The application for Type II cable is exclusively in consumer audio. Type II cable is insensitive to ampacity, resistivity, dielectric constant, etc... Type II cables may vary in capacitance, or self inductance, or myriad other demonstrable properties, but those properties are irrelevant.

In Type II cable production cost bears no relationship to retail price, nor should it. The cost can only be evaluated in terms of how it makes the purchaser feel. Like a Prada handbag or a Louis Vuitton shoe, Type II cable is purchased for its intangibles, not its functionality.