@Adam_Cadmon1 I don't know. Seems like different issues, maybe?
Some stories seem to only need eight episodes, which is at least longer than a movie. Others struggle to fill 13 episodes (the Netflix Marvel shows come to mind), and would be totally lost with 20+.
I miss the long shows, for sure, but I think the serialized shows not telling a complete story is a different issue. I mean, "Lost" had 24-ep seasons, at least at first, and still didn't tell a complete story at any point.