May our Macs live forever!
Just to put it into perspective; I had been using my old PM9600 for ten years before replacing it. I replaced the CPU, disabled a L1 cache resistor on the mobo to enable the L2 cache on the G4 CPU, maxxed out the RAM, got rid of the SCSI drives and put ATAs, Sonnet tempo trio card, 32mb video card and two DVD burners. It still ran 10.4.10 when I donated it to my GF's classroom for her so she can edit audio for her dance class that she teaches at the H.S. I just sold my 6 yr old Powerbook g4 1mghtz to a friend for $600 (also maxxed out)and I miss it too! So what I am trying to say is that a new Mac Pro in my opinion will last me another 10 years, before I absolutely have to get a new one. Maybe in 5 years I will sell it, but I doubt it if I can do similar upgrades over time like my old trusty 9600. Let's just hope that they can support upgrades and not change sockets (like they did on G3s with the ZIFs) too soon.