At the markups they are making they could be hand-soldering the bits and still be ahead, scaling existing process makes more sense than investing more in research.
Disappointing that they didn't toss in an image showing the difference between 6T and 4T. Here's a good one:
https://semiwiki.com/forum/threads/samsung-teases-16-layer-3...
Sounds rather more like a company behind the innovation curve pretending to "skip" the innovation as if to jump into a better innovation.
When the actual truth is they are sticking with the old thing. Reframed as a choice.
If "Ditching 4f" is such a good idea, why show their hand right before their competitors make the foolish choice of releasing it? Why not hold your cards until afterwards?
Unless perhaps this isn't a brilliant strategy but instead a spin for the investors?