Steve,
I'm familiar with your position on this topic. But I'm not convinced that the number of aerobic sessions is as small as zero.
I have to admit, however, that I sometimes forget my population ... for clarity, the majority of my population is active-duty Military, so "regular" means something different to me. That's not to say that I don't consider or come in contact with "regular" in the sense of the usual sedentary American lifestyle.
In the article that I wrote for Pavel, I cited two studies that discussed greater fatty acid oxidation via high-intensity training (and I think that we might be able extrapolate this to S&S style PCr style training) but not through mitochondrial up-regulation and increased volume, as seen in actual low-intensity, long duration work (LSD).
Now, mitochondrial flexibility is a buzzword in recent research - the "health" of the cell, has been attributed to the function of the mitochondria. Metabolic flexibility is the ability (or lack) of the cell to make efficient use out of both glucose and fatty acids. I "think" that LSD once per week for most of us is valuable.
I'm 90% of the way with you, Steve, on this subject, but I also consider the diabetics, cardiac patients, obese patients, and the generally ill-health retiree population that I work with as well. My hands are tied with prescribing S&S at this point in their training career. So, we have to start somewhere.
I apologize again that I sometimes forget the context in which my clinical experience exists. Perhaps getting to 90% is enough - I mean, it's an "A".
One more observation ... those who used to train at my facility years ago ran the gamut. We used a lot of high-intensity training at that time, and I noticed that those who came from endurance stuff fared much better and for much longer than those who only did the high-intensity stuff. This is, however, not a random controlled trial - just me noticing a pattern, which I still "see" to this day.
Maybe there is something to building a huge aerobic base - for performance, of course.
References:
1) Hopeler, H., & Fluck, M. (2003). Plasticity of skeletal muscle mitochondria: Structure and function. Medical & Science in Sports and Exercise 35(1) 95-104.
2) Seiler, S., & Tonnesen, E. (2009). Intervals, thresholds, and long slow distance: The role of intensity and duration in endurance training. Sportscience 13(1) 32-53.
-Al