Shit, even Berserk is building towards something. I don't care how long a story is a long as I know that it will end with some sort of resolution. What's the point of reading X-men or Spiderman when you know it will never end? There's no continuity, it just feels so pointless.
Most of these stories have arcs that act as termination points.
This is especially so when those arcs include a change of creative teams.
Not a hard concept to understand.