I'm sorry Michael...not that I want to be pedantic but...the whole history of GPU cards, especially for the Windows side, is totally full of heavily unoptimized software/drivers.

This is a fact.

I put my hands on many powerful machines equipped with really powerful GPUs and none of them was capable to express all of the the potential of the cards, and this totally due to the obsolete and heavy OpenGL layer.

Metal API has already proven that is capable to get the best out of the modern cpu/gpu

So, I really hope that very soon, we all say a definitive goodbye to the "the dinosaur" OpenGL :)

Ciao.