There surely was never any danger of that. If bias were black body radiation, you'd be glowing at about 3500K. (Which hurts your credibility substantially. And likely not just with me.)
Now, I certainly don't care for NVidia keeping their drivers closed source. But in my experience with graphics drivers under Linux (which goes back to VooDoo1 and the original, pre Daryll Strauss, glide driver, and having lived through the hell that has been FOSS Radeon driver, I'd have to say that on all the cards I've had, including some NVidias, the NVidia driver has been flawless compared to the big mess that the usually incomplete FOSS video drivers often seem to be.
I wish that were not that case. But it has been my experience for about 10 years now.