If someone says cross platform and it supports Linux, Mac, and BSDs, that is good enough for me. I have not done any development work on Windows in my entire life just like I have not done any development work on my Android phone.

Just offering a counterviewpoint.

I for one do not expect windows support in a build system. Recently, someone said adding support for space in the filename in make adds a complexity we can avoid. I'd argue adding Windows support adds a complexity we can avoid. I'd rather they didn't support Windows. I say we can revisit this issue if enough people still use Windows on the server ten years from now.