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The author has two main points -
1) size -- we used to do more with less. The cost of RAM and drive makes this a non-issue, fun only for nostalgia. (And he's conveniently forgetting the other costs of those old systems: learning assembly, having non-portable code, runnable only by geeks, etc.)
2) innovation -- this is the more interesting point. It even gets raised on GNOME's developer lists and other places. Don't just look to MS for something to clone, do something that really rocks. Ok, that's a fine point.
Cars haven't really changed all that much over the past 40 years either. But when I upgraded from a '69 VW van to '00 Toyota Corolla, I was blown away by things like how well the brakes work, how easy it is to reach 60mph, how nice it is that the handles all work, how I have airbags instead of my feet for collision defense. Yeah, wing windows rock and I miss them. But I'm not going back. I bet you aren't either.