While I do like using the latest and greatest tech, sometimes it's better to use something older. Perhaps it's the keyboard that you can really type on or a touch pad that seems to rule above all else. (One of the most hated things that they do today are the island style keys on the more recent laptops. I much more enjoy the old thinkpad style keys. They are much better and faster to type on with so much greater accuracy.) Older laptops are also less likely to be stolen and you are much going to care much less you you accidentally drop it somewhere or lose it entirely. Plus, for simple web browsing, old computers are still surprisingly effective.
The computer that I am typing this on is an old HP that I installed Linux on. More importantly, since I decided that this computer should be as cloud centric as possible was the decision to install a cloud based OS called Joli OS. It's wonderful HTML 5 design plus it's small overhead make this laptop (which has 2 GB of RAM, mind you) a joy to use. I feel like taking this out with me to the library or a coffee shop, since I don't mind if I lose it or even it I crack the entire screen. That's what makes it so great
Another thing about old computers: optical drives. While I do think that there is no need for most people to use discs anymore, I still have a giant collection of discs that I use from time to time. But that will probably not be the case as I buy more flash drives to boot media off of.
We really shouldn't judge whether a computer is good or bad based on it's age. We should be judging it based on the usability of improving our everyday lives.