What is Microsoft doing with Linux?

Microsoft is submitting patches to the #Linux kernel "to create a complete virtualisation stack with Linux and Microsoft hypervisor". And when Microsoft wanted to add container support to Windows, it picked an open-source specification designed originally for Linux rather than the internal Windows-centric implementation it had already written.
https://www.techrepublic.com/google-amp/article/what-is-microsoft-doing-with-linux-everything-you-need-to-know-about-its-plans-for-open-source/