Sometime I really don't understand people that get into the cheaper model just to get cheap and to save..to save what?
I agree with your point on those who add the majority of missing content after the fact, but only an idiot would pay for items they don't want. For instance I rarely listen to music, so couldn't give two hoots about the Fender upgrade. Don't want leather, hole in the roof, 18" wheels, low profile tires, etc. I drive the crap outta my car, so prefer omitting unused stuff, seat surfaces that look like crap after 2 years, rims that bend easy, and so on.
So why go cheaper? Because, for lack of a better word, vehicles are one of the worst 'investments' you'll ever throw money at (not that they actually qualify as one). They depreciate in fiscal value faster than just about any other 5 figure purchase. By the way, spending thou$ands extra for the express purpose of resale value is a farce when you do the math.