Google folks who have been primary designers of the new shader language have been deeply involved in SPIR-V; and Apple has made its own shading language, Metal.

Google folks who have been primary designers of the new shader language have been deeply involved in SPIR-V; and Apple has made its own shading language, Metal. Apple also produces GPUs that ship in very high volume via A-series SoCs. I’m not sure why you think the people involved in this effort are clueless about shader languages. That does not seem supported by the evidence.