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It seems you're using the term setting in a non-standard way to mean genre conventions. Given that, I would say that a mastery of genre, including the fulfillment of the expectations of the core a...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/18262 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
It seems you're using the term _setting_ in a non-standard way to mean genre conventions. Given that, I would say that a mastery of genre, including the fulfillment of the expectations of the core audience, can bring short-term popularity, but that only good writing will endure over the long term. It's also worth noting that the most popular works typically draw on a given genre, but subvert it or transcend it by taking it in unexpected-but-satisfying new directions (that way they not only pick up the core audience, they expand upon it) --and it takes excellent writing to manage that task. As @what noted, however, the impact of _selling_ can outweigh both quality and genre appeal, at least in the short term.