[toast0]

nitpick, they did PPC -> x86 (32), the x86_64 bit transition was later (no translation layer though). They actually had 64-bit PPC systems on the G5 when they switched to Intel 32-bit, but Rosetta only does 32-bit PPC -> 32-bit x86; it would have been rare to have released 64-bit PPC only software.

[EricE]

They had 64 bit Carbon translation layer, but spiked it to force Adobe and some other large publishers to go native Intel. There was a furious uproar at the time, but it turned out to be the right decision.