>>279683057I should mention that "for their own sake" I mean for the sake of their writer integrity and the story they had in mind when they started, not "for their profits", because it's definitely more profitable to drag a series on for decades and have merchandise.
But I'm sure everyone knows a story that went on for too long. Monster Musume for one in my case. Oroka na Tenshi Akuma really dropped in quality after 10-15 volumes for me, to the point where I was considering buying it before but not anymore. I also don't know how people read those romcoms where it takes 500 chapters for the first kiss to happen.