http://www.businessinsider.com/microsof ... nux-2018-4
"After 43 years, this is the first day that we are announcing, and will be distributing, a custom Linux kernel," Microsoft President Brad Smith said on stage at an event in San Francisco...
When Microsoft CEO Satya Nadella took the job in 2014, one of the first things he did was announce that "Microsoft Loves Linux." Since then, Microsoft has added robust support for Linux in its Azure cloud platform, while letting developers integrate Linux with their copies of Windows 10. In 2015, too, Microsoft developed a much smaller Linux-based technology as part of a larger open-source software package.
This, though, is the first time that Microsoft not only developed a version of Linux all its own, and then made it the cornerstone of a product offering. It's just proof that anything is possible.
Finally, a more proprietary Linux kernel.