My own SSG — GreenFedora — is in its fourth major iteration now, and it's still evolving. It works really well for my needs. It was too specific to my needs to be of use to anyone else to begin with, but I've abstracted it further and made it more generic in recent versions. Some of my friends use it now too.
I am even starting to write some documentation. Even if nobody beyond a few friends and I use it, I may as well do as good a job as I can.