Actually, what the consumer can afford being a limiting factor is PARTLY true. We can DECREASE the costs and we can INCREASE the consumer's finances.
Henry Ford reduced the cost of a Model T to a low of $345 as economies of scale were realized. Whil;e the cost of a model T dropped from $870 in 1909 to that $345 he INCREASED wages from some pittance to (GASP) $5 A DAY! Other manufacturers warned Ford that these wages were RUINOUS! Ford said at his proces, every worker could buy a car, he was creating CUSTOMERS as well as employees.
Remember a DUSENBERG rolling chassis cost $8-9,000 , then you had built a body on that for a few thousand more.
In the '50's and 60's main frames cost hundreds of thousands of dollars, were as big as a small house, required minuite to miniute maintance. Today, the computer I'm typing on cost (box, no printer, no keyboard, no screen) about $400 and can do more than any computer at any price could in 1965 and requieres some minimal housekeeping once a week (sweep those cookie crumbs out) and we replace them every couple of years with mild aplomb.
Economics are dynamic, not static, and also not a zero sum game.