That was the case when Mac Pro would still be a viable option for a workstation. Now it isn't, and Windows, despite improvements, isn't there yet. So many researchers and HPC users, including myself, are stuck with Linux desktops. I am not happy about that, as my Mac Pro used to be much better. But there's nothing I can do about it now.

(And, of course, Nvidia is the only choice for now if you want GPGPU computing).