Comment by webstrand

Yeah, the issue is that there are no utilities for manipulating OsStrings, like for splitting, regex matching, or formatting OsStrings/Paths.

For instance the popular `fd` utility can't actually see files containing malformed utf-8, so you can hide files from system administrators naively using those tools by just adding invalid utf-8.

    touch $'example\xff.txt'
    fd 'example.*txt' // not found
    fd -F $'example\xff.txt' // fails non-utf8

The existing rust libraries for manipulating OsString push people towards ignorance or rejection of non-utf8 filenames and paths.