Hey Doc, you shouldn't compare your upgrade cycle with the average computer user, who is happy when the system runs fine and can connect to the internet to read some e-mails and surf a bit. These persons do an upgrade (or buy a complete new system) when the old one crashes down, but not earlier. I know a lot of people who use 5-10 year old computers with Win98 and AMD K6 processors and maybe GeForce2 cards in it, believe it or not!
