Excellent post grapeshot.
If your OS version is a couple of years old, you begin to find that new software won't work with it, forcing you to upgrade. In the Windows world, you can reasonably expect your OS to last you for the better part of a decade.
I hear that from Mac users once in a while and to me it's almost incomprehensible, I don't mean solely from a technical stand point but from a practical one.
-rgdot
Agreed. I have OS X 10.4 installed on my iBook (highest OS version I can install on a PPC Mac) and am constantly confronted by software that I cannot update on it or install in the first place because the OS is "too old". grapeshot's first comment:
It has trouble working with some of my peripherals, it occasionally doesn't want to find an external drive, and locks up a surprising amount, requiring a hard re-boot.
-grapeshot
Resonates as well, given my experiences maintaining my parents' machine and my iBook. I like OS X enough, but it is hardly more stable than my Windows (2k, XP, Vista 32 bit, 7 64 bit) machines. Granted, I don't have access to a Leopard or Snow Leopard machine, but still...