Ah ok, so its not so much the mobile architecture as the realities of embedded GPUs and unchanging drivers compared to more uniform nVidia/AMD desktop drivers.

Ah ok, so its not so much the mobile architecture as the realities of embedded GPUs and unchanging drivers compared to more uniform nVidia/AMD desktop drivers. This is a real problem but I'm not sure splitting the API is a solution. If a cheap mobile GPU has broken functionality or misreports capabilities, I'm not sure the API can really protect you.