Why haven't audiophiles enthusiastically endorsed the SACD?

[Kevio]

A sine wave is far smoother with the DSD process, and its dynamic range is extraordinary - 120db. While the frequency response of 0-100,000HZ is impressive, I have yet to understand the benefit of recording material so far beyond the capabiliites of human hearing.

Same here. I'm convinced that the principal improvement in the sound from SACD comes from the additional care taken in making and mastering the recordings.

Keep in mind that audiophiles, as a subgroup of buyers, don't have the capability to make a new format a sales hit. The numbers needed for volume sales simply aren't there.

True. Also add to this the fact that audiophiles tend to be freethinkers and don't generally act as a cohesive consumer demographic.