https://wccftech.com/windows-10-pro-officially-recommended-for-amd-ryzen-threadripper-3990x/

It was recently reported that AMD's Threadripper 3990X might not manage to give full performance on Windows 10 Pro. Based on early reviews done by Anandtech and others, it appeared that Windows 10 Pro was splitting 3990X's 128 threads into two groups of 64 each, impacting the performance (more details here).

As a result, higher editions of Windows 10 like Windows 10 Pro for Workstations and Windows 10 for Enterprise seemed to be the answer along with Linux.