This sounds sketchy. Either the rest of the industry is incredibly incompetent or they are deliberately omitting a huge drawback of this solution. And I don't see lack of expandability as a drawback, just buy a bit more RAM to start with.

Then there are NVIDIA GPUs and Intel Phi (i.e. Knightslanding)... So they are trying to sell us that neither AMD, NVIDIA or Intel have though of this "ingenious" decision to increase the efficiency obtained by co-locating CPU and memory? The fact that they deliberately avoid addressing this elephant in the room makes me super skeptical.