He cares, but you have to remember that Nas is in a different lane than kendrick and the rest of the guys that kendrick mentioned. I think that someone like Nas, with age comes knowledge and I think that Nas knows that for 1:claiming you're the king of something, doesn't necessarily make you the king, and 2:he could careless about who's the king of whereve, he's done his job; he's made his imprint in hip hop and he's became a living legend. What's the need for him to compete? The only thing that is important to him now is making good music, hearing good music, and knowing that hip hop is progressing.