[SilasX]

>They also don't want to alienate their customers. Imagine if you bought a new, $100,000 Mercedes, then they announced a week later that the new one would be more powerful, better styled, had all sorts of new gadgets, and would be immediately on sale for $100,000.

Well, yeah, but I bet a big part of that is how we haven't adapted to expect that to happen, the way we do for computers, smartphones, TVs, etc.

And the rest of it is probably attributable to cars being a much larger, less often-per-person purchase than a computer or smartphone.