Because single or dual/quad G4s is the limit of what ArticiaS(Peg1/AmigaONE) and Marvell Discovery (Peg2) are designed to cater for ( in fact Marvell Discovery is only designed for G3s, that it works with G4s is in incidence of compatibility ).
To use a G5 requires a new northbridge, which requires getting one from the same place Apple does or waiting for a supplier of northbridges to come out with their own. Oh, and that is just the start of your design issues.
That G4 became outclassed was mostly down to Motorola and Apple, that IBM favoured its higher end POWER series was entirely down to Apple sticking with Morotola against the evidence.
We KNOW that the A1 and Pegasos range is behind the curve technically for even personal computing, it is a start, this time next year if we are still all stuck with G4, then is the time to whinge.
If you want to look at the outside reasons why IBM shaved off parts of its 320,000 strong workforce I suggest you look at last years and the year befores published 4th quarter report.
Trying to say that the G5 should have saved that workforce is tacit admission of ignorance of corporate politics and shortsightedness - not least no G5s had gone on sale.
Me? I don't know what you are moaning about. :-)
