I think it's exactly this, which makes the comparison to Lennon / McCartney so apt. Even as readers of the book learn that they are rather compared to Metallic

I think it's exactly this, which makes the comparison to Lennon / McCartney so apt. Even as readers of the book learn that they are rather compared to Metallica. I agree that it needed the two Johns to make iD happen. On a sidenote: To me John Carmack is one of the true hacker heroes. That's for his almost militant stance aganst patents and for his generousity in sharing his code.