Here is what Japan taught Detroit about making cars:
For your 1970 Ford Bronco, Ford had to inventory two dashes; One with the radio/speaker hole and one without. Today, your Bronco radio-delete-dash would have a speaker grill covering an empty hole.
Detroit did the same with air conditioning ( back in the days when AC was still an option ). Two different dashes had to be inventoried which complicated things, such as, how many AC dashes do we inventory and how many non-AC dashes do we inventory.
Along came the Japanese with just-in-time manufacturing. Did you want the cheaper Honda with no air conditioning? No problem. You still got a dash that had all of the vents the AC dash had. You just did not get all the plumbing that went along with it. Japan saved money because there was only one style of dash to produce and inventory.
Same thing today if you manage to buy a car with no radio/stereo from the factory. It is easy to install aftermarket sound systems because all dash wire harnesses, including the radio-delete units, come equipped with all of the sounds wiring. This lets the factory inventory only one dash wire harness and also just one dash. While previous production methods required four configurations of one dash to be built and inventoried. And don't forget that all of the black, red, blue, and tan dashes had to also be provisioned for.
Dash with no AC and no sounds............... One red, one black, one blue, and one tan....................4 dashes to inventory.
Dash with AC and no sounds.....................ditto.............................................ditto....................ditto...........ditto
Dash with no AC and with sounds..............ditto.............................................ditto....................ditto...........ditto
Dash with AC and with sounds..................ditto..............................................ditto....................ditto...........ditto
==============================================================16 dashes to inventory.
Solution: Build one dash with AC and sounds and 16 dashes comes down to 4 dashes to warehouse. The dash will cost a little more but no warehouse to build and less money to borrow and tie up in inventory.
With that, I think I am ready to play some Trivial Pursuit. . And know that I am closer to riding off into the sunset