Source Depot is what it was called. IIRC, Windows was moving to Git (through some virtual file system [0]) and had some major teams actively using it, but that

Source Depot is what it was called. IIRC, Windows was moving to Git (through some virtual file system [0]) and had some major teams actively using it, but that was a while ago too. [0] https://github.com/microsoft/VFSForGit https://github.com/microsoft/VFSForGit