The prior rumours that Jim Keller had AMD develop the K10 core with the option of using an ARM front end would have created an extremely interesting way to comp

The prior rumours that Jim Keller had AMD develop the K10 core with the option of using an ARM front end would have created an extremely interesting way to compare the merits of the 2 instruction sets. x86 has constraints that make it far more programmer friendly than ARM (weak memory ordering models make my brain hurt!), yet performance has been pushed ahead through techniques that were only dreamed of decades ago. I really wonder what Intel and AMD could come up with using the ARM64 instruction set combined with the knowledge gained from decades of pushing x86 and x86-64 to the limit.