Some careful wording there. I'm guessing that "introduced" means when they initially went on sale or something like that. I'd like to know what percentage of systems sold to consumers 2-3 years ago had processors that were "introduced" 5 or more years ago.

It's similar to the absurdly short supported lifetime of many phones, they support them for "2 years after release" but in many cases people are still buying them brand new 2 years after release.