In a move that feels less like a corporate transaction and more like the final punchline to a 40-year industry rivalry, AMD announced Wednesday that it has agreed to acquire Intel, the company it has spent decades chasing, imitating, undercutting, suing, licensing from, and lately outperforming. The all-stock transaction, which AMD described as a "once-in-a-generation opportunity to unify x86 innovation," would combine the two companies under a single umbrella just a few years after such an outcome would have sounded ridiculous. For most of modern computing history, Intel was the empire and AMD the scrappy survivor, the perpetual second source...