(disclaimer, I work at AWS)

> Do you believe Apple are somehow resource strained?

Oh if only you knew... Yes we are very engineering constrained at those companies. Money doesn't replace the fact that there isn't enough people around who have the skills and are willing to work there at any price.

And on top of that there's the opportunity costs of having them work on this instead of something else...

When MoltenVK exists as a compatible Vulkan impl on top of Metal already, it's very hard to justify this.