Peter looks at how rewriting some complex code -- purely to make it easier to read -- eliminates the need for writing comments. He even adds a comment to some code.

Are you writing your code for humans or computers? I wasn’t there, but my guess is that at the dawn of computing, people thought that they were writing for the machines. After all, they were … ...

Time is money and programmers who don't comment care costing their employer money because what should take a few minutes to understand ends up being an entire day stepping through code (ugh).