Tac45man,
Not all older cars. A fair number only worked with leaded gasoline which is not sold anymore. So the comparison isn't a fair one.
Secondly 5 years is not the length of time we are talking about here. G5s have not been sold since 2005. That was 7 to 8 years ago depending on how you count.
Next let me take you to Robert Cringely's quote:
"If automobiles had followed the same development cycle as the computer, a Rolls-Royce would today cost $100, get a million miles per gallon, and explode once a year, killing everyone inside. "
Thankfully, this isn't quite as bad as that, but you have had a computer that has been new for 7 years, and able to keep up with new technology until then.
The Apple ][e (tm) which was mentioned earlier in this thread hasn't been around new since the early 1990s.
I'm not saying it wouldn't be nice if Apple did keep the loyalty of customers, sure it would be nice, But then it would have no means to stay in business when customers keep demanding faster computers.
We can't question Apple's policies on this board. You can post feedback here:
http://www.apple.com/feedback/