spf13/afero

Hi. I just bumped into afero while searching for Go file utilities - looks interesting! My reason for searching is that I implemented a file copy utility (think programmatic equivalent of cp with many of the same features) some years back and recently have been using it in the riff open source project. See the godoc for an idea of what's there: https://github.com/projectriff/riff/tree/master/pkg/fileutils. Since file copying isn't the focus of riff, I'm considering weaning riff off its own file utilities and using something else instead. Has file copying been considered for inclusion in afero? I know there were objections to including a file copy utility in the Go standard library, but I'm hoping those don't apply to a project like afero...