> The thing is - nVidia uses shared source for all of their drivers. This is why you always have the newest GPU feature support and performance on their Linux driver - it's the same codebase as it is for Windows and was for macOS.

Sure this is almost true, but not quite - there is obviously Linux specific code to support X11 and VDPAU that isnt in the Windows driver, for example. Of course, NVIDIA can decide to not support open drivers, or not support Wayland in their closed drivers, and as a consumer I can choose not to buy their products.