And it wasn’t just the perfect musical choice at the end (and throughout) of the episode. The highlight for me, beyond “Baby Blue,” was Walt’s parting admission to Skyler, “I did it for me. I liked it. I was good at it.”
This statement was something the audience already knew, but it was Walt’s final journey to that realization that made the end of the series so potent. And, as with the arc of the classic tragic figure, it came to Walt far too late for him to reverse the course of his downward trajectory.