...But no way can you wrap it into something that looks posix-y from the inside

Why would you want to?

	▲	repelsteeltje 2 hours ago \| parent [-]
		From the article, first use case: > Example use cases include: > * Running unmodified Linux programs on Windows > * ... That won't work if the unplugged Linux program assumes that mv replaces a file atomically; ntfs can't offer that.