The South Korean Ministry of Internal Affairs and Security intends to migrate its Windows computers to Linux. The reason is simple: Linux is much cheaper and allows you to not depend on a single proprietary OS. If there are no compatibility and security issues, this transition will be a settled issue.
Free support for Windows 7 ends in January 2020, which could spike the cost of maintaining government computers. The transition to the new version of Windows was supposed to take place after 2023. However, the transition to a new OS allows you to solve several strategic tasks with one stroke of the pen.
What about Microsoft's leadership? Does he really care about the loss of such a long-standing and respectable client? No, it's just that in recent years the Internet giant prefers to make more money on its cloud services than on distributing copies of Windows.