I think we all need to be caution of bashing our sources, but OTOH, some sources are dubious at times.
Allow me to give a specific example:
There exists a fairly well known "article" in a trade magazine that speaks to the topic of some GM transfer cases called "pump rub". The supposed guru who wrote the article suggested an alternative fluid, and to overfill by 50% to address some issues his shop was seeing. His suggestions seemed incredulous to me, so I did a bunch of research, including contacting the professional associations in that industry (reman's), the OEM (New Venture), the warrantor (GM), some lube industry tech lines (Amsoil and Mobil), some people here, and even the article author and personally spoke with him on the phone.
My conclusion is that he swagged it! He had no ability to talk to the specifics of fluid properties, viscosity comparisons, analytical data or anything else. He did not contact the t-case OEM and seek research info. He did not seek out lubricant engineer resources. He simply went to the old "thicker is better; more is better than better" mentality with zero understanding of the engineering issues of the equipment he was referencing. He came off to me as an extremely successful owner of a big business, but was taking a "shade tree mechanica" approach. My opinion is that his opinion is total poo! I believe his mis-diagnosis led him to a poor conclusion. OTOH, he probably thinks little of me; who knows?
My point is that some experts are very good and knowledgeable, and others simply make one or two notable claims, and somehow fall into fame due to mythology and rhetoric. It's up to each of us, individually and collectively, to root out the answer amid all the clutter.
Mike L is well respected my most, and loathed by some. I cannot make a comment on his credibiltiy, but I would caution that it's dangerous to take anyone's word without knowing the full credentials and merit of their view.
Do your own research, and make up your own mind. The best we can hope for is to present true facts and credible data, and allow people to decide for themselves.
How does that releate to this thread? First, I emphatically state that I am NOT an expert. Second, we can make recommendations, but there is no way to know for sure that DEX VI will last 100k miles in your application, but for UOA analysis. Period.