Yes the world could stick with AGP 8X for a while, but really that's just stupid. Technology moves on and there are plenty of advantages in PCI-Express.
Hardly ANY computers, maybe 0.001%, have PCI-Express. To claim Macs aren't the mainstream because they use AGP is insane, maybe in a few years time BUT BY THEN Apple WILL HAVE adopted PCI-Express. But even then I doubt graphics cards would be cross platform:
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