GPU firmware interfaces being proprietary and heavily guarded secrets is in no way whatsoever an Apple thing. Even the Raspberry Pi is in much the same boat.

GPU firmware interfaces being proprietary and heavily guarded secrets is in no way whatsoever an Apple thing. Even the Raspberry Pi is in much the same boat. Most of the time it’s an upstream vendor NDA. In Apple’s case they own the whole stack for the GPU so that doesn’t apply here. But it’s certainly not special to not divulge GPU internals.