[kevingadd]

When it comes to Apple's mobile GPUs (and now M1) their main advantage is that they have a custom architecture and compiler and they're both the result of lots of experts working hard on both and leveraging existing work (in the architecture case, the fact that they started from PowerVR's world-class design, and in the compiler case, the fact that their shader compiler is based on LLVM). They're really well-designed chips. Unfortunately there's no particular reason that they would be better at ML than any other GPU, since they had no reason to consider it in the design process until somewhat recently.