The news that Windows 10 will soon ship with full Linux kernel with Windows Subsystem for Linux 2(WSL 2) has the potential to be either a really good, or really bad, for Linux. While it can be considered a victory for Linux in particular, and for the open source community at large, we'll have to wait to see how it actually plays out in time.
That it becomes something great for Linux not only depends on how Microsoft behaves, but also how all big players on the Linux community react to the situation. In many ways, things need to be made in such a way so that its on Microsoft's best interest to play nice with the rest of the Linux world. That means that some people will have to get used to work with Microsoft at some level, and its on their best interest doing so.
Let's face it, Microsoft has come to be a player to stay. As such, we better act in such a way that makes Microsoft do as much as possible to play nice with the Linux community at large. By doing so, we can ensure that the influence that Microsoft has is the best it can be for most of the Linux sphere.
At the end of the day, its better having one of the biggest software companies out there working with us.