I find it bizzare because when 0w20 first came out, the crowd would say it is just water. Which was years ago. Now as time has gone by, has any of those engine have problems lasting to 300k miles with 0w20? I doubt it...There is no paranoia. Some owners don't lease or trade in every few years. Current marketing, like everything in the USA, leans toward disposable products.... chew that bubblegum and spit it out... repeat as needed.
Some of us want and expect to keep the vehicle considerably longer than norms. We don't want "good enough" with our maintenance schedules, fluids/filters/parts used, or intervals. Some of us want exceptional.
Automakers can vote on SAE/API/ILSAC requirements, can request waivers or exceptions for certain performance aspects. So, when you dumb down a standard or are exempted from it with certain oils, do you really want to use it?
If the .1-.2% fuel economy is your goal, stick with the 0w16 oil. Plenty of choices out there regardless if it meets the never ending change of requirements constantly being voted on. My cars that require 0w20 and 5w20 get a full synthetic 5w30. If I were to buy a vehicle requirement 0w16, I'd step up to the grossly thick offensive 0w20 synthetics.
RC wasn't a requirement for 0w16 when it was released. RC was allegedly pushed by Toyota for their .1-.2% fuel economy improvements for CAFE. High moly oils also don't do too well with TEOST testing.... guess which oil test standards were allegedly lowered to give the high moly 0w16 and 0w20 an easier 'pass' concerning TEOST testing?
I've given up on SAE/ILSAC/API when emission components and MPG have taken a priority over engine longevity. "Almost as good" and "good enough" have been the engineering and lubrication goals. "Exceed the previous spec" just isn't on the drawing board anymore.
BTW, my Toyota is more advanced than a Ferrari and will be driven 10x as many miles as most Ferraris, and put thru more stress in my commute than any Ferrari sitting in a garage.
I know there are some vehicles out their that burns oil, but even with a thicker viscosity, it still burns oil regardless. It an internal problem not an oil viscosity problem.