Time it took me to read A Deepness in the Sky: about a year.
Time it took me to realize that the plot is an endorsement of free-market capitalism to an almost Randian degree (minus the class issues): about six months more.
Time it took me to grasp that the localizers in the book are a pretty clear metaphor for the actors in an idealized anarcho-capitalist society: eight months after that.
At this rate, I should be really catching on to some of the subtler symbolism ten years after I’m dead.