Ahh you're right, I thought it was 2017 for the Vulkan 1.0 release. My understanding is still that Metal was released on iOS months before AMD's Mantle API was

Ahh you're right, I thought it was 2017 for the Vulkan 1.0 release. My understanding is still that Metal was released on iOS months before AMD's Mantle API was accepted as the start of Vulkan work.