I can't wrap my head around this thinking. (Not you. Parent.) A friend of mine just bought a brand new BMW. He's going to sell his old Nissan. Whomever buys th

I can't wrap my head around this thinking. (Not you. Parent.) A friend of mine just bought a brand new BMW. He's going to sell his old Nissan. Whomever buys that Nissan will be buying their first car, or selling their old car. The market is interconnected and conditions at one end of it absolutely affect the other end. Just look at the price of used cars last year when the new car stock was strangled. Imagine if, before that happened, someone was arguing that "making a luxury car doesn't increase the supply of cars"