https://www.theverge.com/2019/5/6/1...V7hNkccdNKqOvk8DHyC5T-_PDaKeSZY_IPfw-ui2-Dtyg
“Beginning with Windows Insiders builds this Summer, we will include an in-house custom-built Linux kernel to underpin the newest version of the Windows Subsystem for Linux (WSL),” explains Microsoft program manager Jack Hammons. “The kernel itself will initially be based on version 4.19, the latest long-term stable release of Linux. The kernel will be rebased at the designation of new long-term stable releases to ensure that the WSL kernel always has the latest Linux goodness.”