Yup. OoO is a thing from the mid-nineties for us mere mortals. CPUs like Pentium Pro and AMD K5. Of course the first out-of-order CPU is way older CDC 6600, bac

Yup. OoO is a thing from the mid-nineties for us mere mortals. CPUs like Pentium Pro and AMD K5. Of course the first out-of-order CPU is way older CDC 6600, back from 1964. MIPS R2000 from 1986 could do simple form of speculative execution.