C= was allready planning with non-68k (and non-PPC) CPUs for "Hombre". AFAIR we would have ended up with PA-RISC.
Not sure what that has to do with Apple or Mr. Jobs......
PPC is likely because making an A5000 Win NT PA-RISC based Amiga would be suicide! PPC is the only logical choice as low-end bread and butter A1200 replacement to stab at the nerdy 386 PC gaming crowd sucking the userbase from Commodore.
You pick a CPU with low cost, as Apple were using huge stocks of 603 the production cost dropped AND you do one OS transition and chipset bus interface transition and end up with A1200 AND A4000/040 successors.
PA-RISC would have meant Commodore bankruptcy very quickly as A500 and A1200 were 80% of all Amiga sourced C= revenue, and PA-RISC + 3RD Party Windows **** OS costs = impossible to make low cost mass market future Amiga models.