If there's not enough file system performance, they should improve their file system layer. It'll benefit all Windows applications as a side-effect. Believe it or not, but people actually use Git with Windows :) If Linux is able to pull much better file system performance, I don't believe that it's just impossible for Windows to achieve similar levels. I think that Microsoft sent many patches to Linux kernel before. It might look weird, but it's nothing really new. Their Azure business uses Linux.