Yep. It's a great example of how keeping clean-room reverse engineering legal is good for the industry. While Intel was stuck in Itanium hell, AMD was able to leapfrog them and create x86-64 because it had been legally successful with reverse engineering 32-bit x86 in the past. If Intel had been able to crush AMD in the 90s, there's a good chance x86 would be dead by now.