People Underestimate How Fun It Is to Do the Same Thing Twice

"People can underrate the novelty lurking within things they thought they’d already experienced fully."

In other words, like "comfort food" people find it rewarding to read books or watch movies that they are already familiar with because there is still novelty (fun) hidden within them if the books or movies, etc. are complex enough. An example of such works is found here:

Great Movies Based On Books https://moviewise.substack.com/p/great-movies-based-on-books