Then, why did so many lambaste Amiga, Inc. for making the same choice for the AmigaOne?
1) It wasn't their decision. Tao does not require PPC.
2) Because they're a small-time developer, and can't do stupid things like use slow, obsolete, expensive proprietary hardware. Companies that use proprietary hardware charge you $10,000 for a workstation, then charge you $5,000 for a CPU upgrade from 450Mhz to 800Mhz that works with your system. Yes, those are actual prices. I know this through experience.
3) AmigaOne is a PC, not a game console. The hardware needs to be flexible. Early AmigaOnes didn't even have socketed CPUs, which shows you how much the manufacturer cares about flexibility.
4) PPC market is different than the x86 market. x86 chips are made to be desktop machines, and are optimized for hazardously high performance at the expense of heat, power, and displacement. PPC cores are made for the embedded market, where waste is not tolerated. There's no doubt PPC is a supirior architecture, but, let's be real... PPC's are notorious for getting their asses kicked by x86. It's not the technology that's important, it's the needs (and wants) of the customer. I sure as hell don't want a slow PPC when I can have a fast x86, no matter how huge a heatsink it needs. I'm sure most people agree with me, which is why we all use Wintel machines, not Amigas.
When PPC technology is put to good desktop use and can run circles around x86 without needing "Dual CPUs", I'll buy it. Until then, x86 serves my purposes better. I never wanted a PPC Amiga, and millions of other people don't, either.
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Is it forged in stone that the XBox2 will be a true PPC, a modified PPC specially tailored for the XBox2, or a completely different hybrid CPU? Microsoft is a HUGE company, and I'm sure they can afford to have modifications made to the PPC core just to suit their interests. Nobody said Microsoft is going to take a G5 and solder it to the XBox2 mobo.
Most console hardware is vastly different than the vanilla hardware we PC users buy. Console companies can afford to have their hardware Made to Order. ;-)