I read in a book about Intel (Inside Intel), that AMD has a funny role in the market: To supply chips when Intel can't (for whatever reason). Everyone sees them

I read in a book about Intel (Inside Intel), that AMD has a funny role in the market: To supply chips when Intel can't (for whatever reason). Everyone sees them as a CPU business competing with Intel, but in fact, they are in a way, partners. I also came away from that book with Grove (or Moore?) 's "Only the paranoid survive".