When you look towards ending shows, do you want to do a set number of years? Or do you want to write for these shows as long as the studio and network will let you?
I would love to keep telling stories in these worlds for as long as possible, as long the people who help me tell the stories want to do it. In that category are the actors who bring these characters to life, as the writers who have a point of view on how to tell the stories, as the studio and the network who have to write a check to do so. It’s a big group decision, frankly, and it’s fascinating; the behind-the-scenes of it all is so interesting. When you get to a show that has run this long, you get to a group of people who dig in to their desire to keep doing it — it’s wonderful. We shall see.
Source and more: THR