That's just not the case; Apple were already well behind in performance at the point x86_64 came out, due to them being stuck on POWER. They actively moved to x

That's just not the case; Apple were already well behind in performance at the point x86_64 came out, due to them being stuck on POWER. They actively moved to x86, despite big compatibility issues, because of how much better they were. This is a complete misinterpretation of the above comment.