NVIDIA never really went open source…they opened up their kernel drivers to a degree (by moving the majority of the interesting bits into the GPU firmware at that) but the userspace portion (Vulkan, OpenGL, OpenCL, CUDA, etc) is still very much closed source.
This is from 10 years ago. Nvidia sucked those days. The demand from machine learning changed all that and forced Nvidia to go open source.
NVIDIA never really went open source…they opened up their kernel drivers to a degree (by moving the majority of the interesting bits into the GPU firmware at that) but the userspace portion (Vulkan, OpenGL, OpenCL, CUDA, etc) is still very much closed source.