Re-reading Routine?

I have consistently, through these previous years as a learner of literature, encountered the idea of re-reading texts. I have even seen why these authors, many of them nothing besides words in common, advise their readers to apply this technique, but have never actually convinced myself I should apply it beyond theory. And it is not because I don't believe in its utility, for when I have happened to re-read a text (be that poems, articles or such pieces which are reasonably short), I have found the second time to be an even more completing experience, more so if done the third.

In her blog post, Sonya not only suggests the idea, but goes beyond into enumerating several benefits of a re-read, and even beyond that, she gives an example of a specific re-read and her findings in it. One of the best points made in my opinion is the fact that "we confuse our direct experience of the book with someone else’s (a reviewer’s, a casting director’s, a teacher’s)," and therefore fail to grasp much of the richness of a piece. Sometimes we read in search of mere entertainment, to have a story told. Thats ok, if we only want to focus on plot and maybe even analyze events and characters later on, but then we forget to pay detailed attention to composition, structure, style, patterns and other elements of literature which are also an integral part of novels, in many cases more than the plot itself.

And here I wonder if it depends on the genre read. I know that this course is geared towards literature, but a little thinking outside the box is fine, especially if we realize that we are going to be audience of many reads in our lifetime, each of them unique and not necessarily grammatically or compositionally great. Take anything from a complex set of instructions to a scientific explanation on a phenomena, and compare it to re-reading a novel as "Great Gatsby." It is true that different elements are captured as you re-read the different examples, but I find it absurd to even suggest that said exercise doesn't add up to a better achievement of our objective as readers (and theirs as writers).

But here I must at least question Sonya in her idea of re-reading as a routine. We have concluded that it makes sense to re-read novels maybe three or four times, but is there a limit to its utility? Is there ever a point where you have read a novel so many times there is nothing left for you to take from it? I agree that we will re-discover something every time simply because we are beings of memory, and memory fails to catch all details, leaving some for the next time as if never seen. But I think that there may come a point where you have nothing left to read for, no approach to the re-read that hasn't been tried before.