I'd guess the obsolete that Amos is talking about is "they won't work with current programs anymore."
The obsolete you're talking about is just "there are better machines available."
Example 1: Some of our users are just beginning to understand Win98, but Microsoft does not support it, and nobody writes much in the way of new programs it can run. Relatively few programs you learned to use with Win98 run really well on newer Op Systems, and the machines that ran Win98 quite well frequently can't run the later OS. That's obsolete - Amos style.
Example 2: My machine has only one 2.6 GHz processor, single-threaded, and I've only got 1,024 MB RAM and 400 GB HD space, only 2 ethernet cards, and currently I'm only fixed with 9 USB ports. Obsolete - your style, by any sensible standard. I need a new machine!!!!!