Hell, to take this to the extreme level, look up the PPC 615 — mid-90s IBM processor that sadly never made it to market. It ran x86, PPC32, and PPC64 code nativ

Hell, to take this to the extreme level, look up the PPC 615 — mid-90s IBM processor that sadly never made it to market. It ran x86, PPC32, and PPC64 code natively in the mid-90s, socket compatible with the current Intel Pentium and with comparable performance. Sadly, it was cancelled as IA-64 was expected to enter the market soon, and those at IBM presumed IA-32 (i.e., x86) was about to be killed.