Of all users, perhaps. For the users whom are likely to read these comments, I imagine that percentage to be quite a bit higher.

It's not just machine learning, 3D rendering is moving over to GPU as well and there is next to no support for anything other than CUDA in that space today.

Not everything starts and ends with gaming in the high end computer space.

Octane is the only real example of this I can think of. Nearly every other tool I use is openCL.