I'm using .NET on Ubuntu and it just works perfect. So as a Linux user I am now connected to the Microsoft ecosystem.
Balmer maybe made a fool of himself while dancing the 'developer developer developer', but he was right.
And at least they did WSL cleanly, meaning that they do not rely on proprietary extensions for e.g. Linux projects in VS but simply use ssh. Maybe Ballmer would have wanted to attempt a proprietary lock in (the extend part) -- I'm not sure this would have worked in the context I described, because one important source of the need is people working on remote systems which are real native Linux, so they needed standard things anyway.
(in before the Linux/GNU copy pasta)