> ARM does not have any of these problems, and the only real problem
> comes one of perception and upper scalability, only coming in
> speeds of up to 2Ghz.

ARM up to 2 GHz? Where? I see Marvell currently at 1.2 GHz and Qualcomm (not released yet) at 1.5 GHz. (*)

> considering we're limited to G3 and G4 era PPC's anyways, there is
> no loss there.

G4 currently scales up to 1.7 GHz (MPC7448).


Edit:
(*) Also Intel are currently at 1.2 GHz regarding their ARM processors.

[ Edited by Andreas_Wolf on 2009/3/23 4:10 ]