I wonder how much of it is also about getting out of a local maxima... you are pursuing a specific solution, and are exploring the end of a long chain of choice

I wonder how much of it is also about getting out of a local maxima... you are pursuing a specific solution, and are exploring the end of a long chain of choices you made on how to approach it... and starting over again the next day clears out all those choices, letting you maybe discover a better solution that was on a different branch of the decision tree.