[Syonyk]

> No one has hit a model/dataset size where the curves break down, and they're fairly smooth.

The same was true of transistors, until it wasn't and they started diverging from the predictions about how they would behave when very small. Sometime around the late Netburst era (the Pentium 4/Netburst architecture was sunk by this problem - they assumed, designing it, that it would scale to 8-10GHz on a sane power budget, and it simply didn't as the "improvement per transistor shrink" became less and less).