Let me provide a look at how a car company tracks profitability of a product program: measured are material cost and labor, and these are deducted from the selling price.
You get half a year's use out of each set of tyres so they last twice as long in total, but after the fourth year their material will be inferior compared to new, even if the car was not driven much.
Back in the Greatest Generation years, the American Dream was to own a car and a house and have a life long job that would allow you to afford those material goals.