Here's a great post from Self Publishing 2.0:
Writing Life in 2012 vs 1986
It’s not a bad metaphor for being self employed in publishing, the endless journey part. While some titles are truly evergreen and can persist for decades without little or no updating, most successful self published titles have their time in the sun and then fade away, even if new or revised editions appear. I think part of it is authors like myself who having produced a book that “works” don’t see the point of changing everything in order to meet the latest fashion, use the newest buzz words and fit the current marketing trends. As the water pump below is clearly mismatched to the housing, I see myself and some of my contemporaries having trouble aligning with the current publishing environment.