Through no fault of my own, though.
My desktop is 6 years old and my laptop is 7. Neither will run Mountain Lion, although the desktop will at least run Lion (32 vs. 64-bit Intel is the problem). Because of this I finally need to replace the laptop even though it's perfectly serviceable in all other ways.
I'd put Linux on it but the whole issue is that I need an updated XCode for iOS6 dev.