Ha...exactly!
I'm closing in on six years with my iMac (August 2007 mid-tier release, purchased as a refurb by me in September 2008). I'll have owned it for six come fall, but it'll be seven, spec/release-wise. No compelling reason just yet to replace/retire it, as long as it works and does everything (and nicely running Mavericks, latest Pixelmator, Adobe Illustrator CS6, all the latest Angry Birds stuff, latest iWork releases, etc.).