There's a whole standardization process to this, which everybody can participate in. The whole point of the proposal is to kick off the discussions and standard

There's a whole standardization process to this, which everybody can participate in. The whole point of the proposal is to kick off the discussions and standardization process. Literally nobody expects the proposal to be standardized as-is, so I don't think there should be any concerns whatsoever about the fact that they punted on designing a new shading language. Standardization isn't a "yes or no" vote, it's a process by which the proposals are modified again and again until they come to a solution that everybody is willing to accept. It's simply not possible for Apple to force everybody to accept their Metal Shading Language.