[rarepostinlurkr]

Apple literally published a 200 page guide on arm64 which I linked above, they've contributed low level optimizations and tunings to NumPy, Embree and Blender to name a few projects.

They clearly are helping. Perhaps you've not noticed?

[pmarreck]

They're not publishing any docs about the GPU portion. See: the rest of the thread currently. They give you the Metal API (only designed for Apple OS'es), and that's it.

In contrast, AMD and Intel publish GPU documentation.