This might be a useage thing but author seems to already point out that for a large code review, these two options aren't sufficient, but I've never seen these

This might be a useage thing but author seems to already point out that for a large code review, these two options aren't sufficient, but I've never seen these tools offer themselves as a solution to a large review. They're a diff tool. The author's approach is creative but seems like it's the wrong tool for the job.