While being aware of the limitations of the Noack test, many 0w-16 had crazy-high Noack values and I expect with many 0w-8 we might see even higher Noack numbers. I am unsure that super high moly content, which is typical for many low-viscosity oils, is a "universal good" with no drawbacks.
I believe the viscosity and OCI need to be adjusted to the vehicle usage and while 0w8 and 0w-16 might be a reasonably good choice for a typical user, it is not necessarily the best choice for everyone.
The oil manufacturers are constantly improving the oils so I try not to be the early adopter with my cars. I decided to stay away from the 0w-16 the same way I stayed away from 0w-20 - until I was sure both the oil manufacturers and car manufacturers learned their lessons.
On the EU market the 2021 version of A25A-FXS had in the user manual "use 0W-16 only, you can use 0w-20 once ...", however for warranty purposes, viscosities 0w-16 to 5w-30 are accepted. Being a hybrid that sees a lot of city traffic including many short trips, and a lot of high-speed highway traffic we settled for 0w-20 and a reduced OCI. To be on the safe side I decided to use 0w-20 having approvals that demand above-average engine protection - my favorite approvals are MB229.71 or MB229.72. Unfortunately, there are no similar approvals for 0w-8 or 0w-16 that I would be aware of. With these "new" viscosities, you have to blindly trust the oil manufacturer and the selected product line.
Btw. Is there any SAE paper/presentation providing results of the Infeneum Camry Hybrid 2012 study? The study should have ended in 2016 and 0w-20 and 0w-16 were used. I managed to find only some brief interim results published in 2014/15 (message: engines after 100k look clean with 7.5K OCIs, fuel savings are measurable) and nothing more recent nor more detailed. In the previous study, the OCIs were short - around 3K and yet there was some varnish.