So for me, it's one thing to creatively decide to wrap it up because we've said what we need to say, and quite another to decide that arbitrary number x is as much as anyone ever needs to express themselves because starting something new intrinsically holds more value.

+1. My introductory model for long-form serial storytelling was in many ways (mostly by virtue of being the first show I cared about enough to follow on my own) Babylon 5. I don't need a show to go on forever. I do need it to end when the story says so.