Probably no real help, but win10 is (or soon will be) bundling in bash
shell, which may address many of the reasons to use Cygwin. From posts
I've seen on a number of lists, I would not be surprised to see cygwin
slowly decline into obscurity. I see little interest in the emacs devel
list for cygwin since the native windows version has matured (and it has
been suggested, is the largest emacs user base).