These aren't necessarily conflicting assessments. The addition of the GSP to Turing and later GPUs does mean that some behavior can be moved on-device from the drivers. Device initialization and management is an important piece of behavior, certainly, but in the context of the all work done by the Nvidia driver (both kernel and user-space), it is a relatively tiny portion (e.g. compiling/optimizing shaders and kernels, video encode/decode, etc).