The plan is to support windows before 1.0, although the core devs are reluctant to "open up" to the large amount of developers windows support would bring before they are finished making breaking changes.
Re:Crystal: Fast as C, Slick as Ruby
by rogerdpack on Thursday August 04, 2016 @06:17PM
(#12228856)
I don't think they're afraid of it, more like haven't gotten around to it would be my guess...
Crystal supported Windows (albeit unofficially, and it was an epic adventure to compile it, and I've never tried running any serious code on it), however all support practically ceased when it switched from libpcl to inline ASM for coroutines.
Windows support was implemented by the community, Not the creators.
Of course the Crystal people probably don't have the same number of developers working on it as Go did even early on.
Edit: Go took a little while to support windows, not until around July 2010. See this question from November 2009: http://stackoverflow.com/questions/1717652/can-go-compiler-b...