I will take Metal over Khronos APIs any day of the week, if Khronos would be doing the Internet, all we would have as standard would be IP protocol, with everything else as custom extensions.

The Khronos APIs are the ones I have more experience with, and it pains me that all these years it stays as kind of initialiation ritual to go through all the things they miss versus proprietary APIs.

Everyone has to write their own mini-engine with their APIs.