The thing works. The world does move. The rules churn. The descriptions step their way through their own internal logic. The lines of code set more switches, change more states.
Commands produce results.
Don't mock me. In a general sense, then, Plowing the Dark is about creating realities. That gets very boring after some time, particularly when the guitarists in question are closer in skill to speeddemons like Eddie Van Halen than to masters of the instrument like Mark Knopfler or J. Marshall Hendrix. So that's where Plowing the Dark seems to sit. Or the main battle tank.