This is the kind of low quality information you see on fanboy forums. There is nothing special about Linux drivers and anyone can go look at them. A lot of hardware uses a HAL and there is a smaller OS adaption therefore most of the code is similar across OSes.

Virtualization means you now have multiple layers of drivers and privileged code in the mix to add and amplify bugs, it can and should work but if you are doing this in the name of stability that is a bit curious.

The reason Netflix can do what they do is they have good relationship with their HW vendors, NVIDIA(Mellanox) and Chelsio. If they were on Linux, they'd need the same level of support.