When any of the G4's were introduced, they were compatible with older HD's, so easy to bring old data onto the new machine and have some extra storage.
Patrick, the point I was making was that if I had upgraded (for example) a G4 866MHz with a 60GB drive (cheapest per GB at the time), it would still have space for a 120GB drive now. And a 300GB drive in two years' time when that is the cheapest per GB.
If I do a reasonably-priced HD upgrade on purchasing a G5, I will have no more bays free in the future.
That fact that huge HD are available now doesn't mean we should just accept that Apple doesn't have an expandable pro-desktop case.
There have always been HDDs of a size that you could have said were huge (like the 250/300GB drives today), but before there have pretty much always been more than two internal bays.
We pay a large premium on Apple hardware (compare 1.6GHz G5 with a P4 3.0GHz) and we have no alternative manufacturers to choose from. Having the pro case with only one optical drive and only two HD bays that don't accept even older drives (because the P->S ATA converters don't fit) isn't a brilliant situation.
Anyway, I know this is the price I pay for being a Mac user. Apple can only fund it's innovation through high hardware pricing.
The G5 case is revolutionary and a design leap, but it would have been a greater one if it had not made compromises in expandability.
-Ben
(awaiting a 1.6GHz G5 with combo-drive, no modem, 9600 pro, 1.25GB RAM and 17" NEC 1760 LCD)