For me, debunking the stairstep myth is an old story, so the guy is preaching to the choir. Hopefully, anyone trained in basic digital audio principles has already learned that after the low pass filter, there is no stairstep, period. You can recover a sine way just below the Nyquist frequency, say, 20 kHz, just as easily as you can recover a 1 kHz sine wave. End of story.
