Here we go again, we're getting into that "how much protection is enough" hole. If an oil protects you engine over a wide range of operating conditions, then, how much is it worth to use an oil that would protect it even more. In other words, if an oil could be formulated to produce "zero" wear, then what advantage would it be to use a more expensive oil with more sophisticated add pack? I personally know guys who use ANY oil, mixed with ANY oil, and almost never change it and still get reasonable life out of their cars. For a lot of us, we won't keep a vehicle long enough to know the difference. For those who do keep one long enough, I'd bet that you could never tell the difference between the use of top tier oils, and ST, RK, AZ, Oriellys etc.
It all gets down to what you're comfortable with, but I gotta tell you, oil sales is A LOT of hype. We get all up in the air about moly, yet some really good oils have none, then it's Titanium, and again some have none, Boron, yatta, yatta, yatta.
You can argue all day long, but there's just too many cars going too many miles with cheap (not inferior) oils, and you just don't see them along side the road dead. I like some of the higher end oils, and I'm also affected by the hype somewhat, as the oil companies have done a real good job of advertising and scaring us into thinking we need the best. Heck some of the conventionals carry that ludicrous 350K miles warranty etc. How many have ever proven an oil related failure?
Have you ever read any of the ST UOAs?