As others have said, nothing requires them to do this.
And, as a practical matter, the fact they used Windows seems to indicate they can either maintain a kernel entirely in-house (as essentially no MS developers have security clearance) or that they aren't focused on what the kernel does in the first place and do all of their special software in userspace. My money's on the second of those possibilities.
As others have said, nothing requires them to do this.
And, as a practical matter, the fact they used Windows seems to indicate they can either maintain a kernel entirely in-house (as essentially no MS developers have security clearance) or that they aren't focused on what the kernel does in the first place and do all of their special software in userspace. My money's on the second of those possibilities.