How come a lot of anime series don't last more than

Because they are expensive to make.

It's better this way, we could have a few zombie series that go on forever with only one season of something mediocre that quickly is forgotten
you know what medium I am talking about.

Most anime are advertisements, they stop airing when the money stops coming.

>>161227215
Then why is the Walking Dead still ongoing and somewhat popular?

Not too many are popular enough or have enough source material to last as long as Gintama or One Piece

>>161227574
>One Piece
Well that series hasn't aged well either, and dragging it is just making it worse.

Because most are advertisements for the source material and are meant to hook you into buying it to get the rest of the story.

I prefer the 13-26 episode format, you don't need 60 episodes to tell a good story.

>>161227950
Yet few anime manage to tell a good story, let alone one that is complete.

Because Japan can't write good stories?

>>161227611
To be fair One Piece is how old by now? 20 y.o.?

>>161227082
LoG was 100 OVAs though

>>161228069
They're celebrating 20th anniversary now but that's not really an excuse, Oda should know when to quit. Naruto and Bleach did, though not before them going shit

>>161227082
You could ask that same question for 3d tv shows. More isn't always better. For example I think Chaika would have been better with only 1 season, I was fine with an open ending. I did enjoy season 2 but not nearly as much which brings down my over all opinion of it a little bit.