I do. What it comes down to is that Apple's support cycle is based on giving many years of support for current (non-discontinued) machines (7.5-8.6 years, on average, depending on when in the product cycle you bought it).
As I mentioned earlier, when you buy a discontinued machine, you're making a choice to get fewer years of support, but at the same time should expect the product to be heavily discounted based, in part, on that.
That's why buying discontinued machines is a good deal, especially if they're still under AC+, and you're smart about shopping around (unless you buy them from the Apple refurb store, where the discount is negligible).