That's a pretty good article and sums it up quite well.
Something people may not know ( or not understand the significance of) that SKF developed their GHG grease not just for cars but rolling stock in general ( including haul trucks, locomotives etc.)- it works for everything else too
From that perspective these much larger ( and substantially more expensive) bearings are more subject to brinelling ( and false brinelling) as well as fret and flat spotting during storage and subject to all kinds of vibrations. ( its hard to get people to store bearings and seals properly on a shelf)
SKF, Timken and many others place a high degree of importance on protecting bearings in storage and transit because that's where most non machine induced failures are traced back to ( other than installation) and when you get into bearings costing several hundreds to thousands of dollars each- this gets peoples attention real quick.
Many of these defects would be invisible to the average car owner and the car application but almost immediately identified through vibration or other methods and can cause issues on certain machines.
Some of these crystalline structures are basically "block grease" roll mill pulverized and added.
Depending on the specific bearing and application, some of those additives are above NLGI-6 and others above NLGI-8 even so they do give a degree of custom protection and they can be "felt" to a degree. They do grind in and adapt to the use but they also help to reduce metal to metal contact during shipping and setting for long periods of time.
Most people who don't deal with anything but the regular SAE greases (J310) might feel greases 5 and above as something "wrong" at the first time they experience them.
Just a quick blurb for anyone who might wonder what is so unusual about the way they do things.