I'm somewhat surprised that no one mentioned the Endian thing - and the pain in the bum generated when trying to convert from one scheme (the m68k series of processors) to another (Intel).
The PPC series was always intended by its designers to be a successor for the 680x0's, and was designed to be (relatively) easy to change over to.
Not to mention that it is a better processor. In my opinion. (heat, registers, RISC, fresh design not pretending to be a CPU from 1976... ;-) )
PPC was reinforced as the Amigaone CPU as a) there is already Amiga S/W that caters (at least a little) for PPC, and the OS4 developers didnt want to have to arse around with Endian shenanigans as well as having to remove Custom Chips dependencies.
If you doubt, I'm sure Rogue and/or EntilZha will confirm ( Hi guys ! howz it goin ! :-D )
