Most of high-end VFX is on Linux these days anyway... And a lot of the GPU stuff is CUDA, so nvidia only... I know for certain that many VFX software companies

Most of high-end VFX is on Linux these days anyway... And a lot of the GPU stuff is CUDA, so nvidia only... I know for certain that many VFX software companies aren't too happy about OpenGL being deprecated and Vulcan not being supported on recent MacOS releases. IMO it's going to depend quite heavily on the demand for high-end VFX software on MacOS as to whether they bother with ARM ports if the MacPro does move over...