The Mac is like the Amiga, in that users expect their computers to last more than three years. Upgrading is something you do because you want to, not because an OS and office suite vendor demands that you do How many Mac models should OS4/Mac support?
Note that, MS Office XP** and Windows XP** works fine on Celeron @433Mhz/PentiumII @400Mhz IF you throw in at least 256MB of RAM(PC66) and 7200 RPM hard disk(~25MB/s sustained). Pace for the development of core logics in X86 markets is mostly due to competitive forces e.g. battle royal between the following players i.e. VIA, NVIDIA, AMD, ATI, SIS, ALI/ULI and Intel.
**Assumed to be Microsoft.
