@Kuroageha
I'm not sure what you mean by 'the industry in general' because manga could get cancelled for a multitude of other reasons:
1. cancelled to get a rebooted adaptation
2. issues with creator's life: like poor health , death , being arrested , divorce , etc.
3. issues with the magazine/publishers itself
even though heavy object manga is cancelled, I expect it will come back a few years later with a 4th manga series, so I don't consider it as a serious/permanent cancellation. I'm too lazy to research more to check the likelihood of my theory though, since it doesn't affect my enjoyment of the manga/novel itself.
either way, none of these cases are really because of low-level writing as Fuka's mentioned, which is my main point, so I'll stop here because I'm not that interested in extra trivia.