I think it's past time for another Stupid Questions thread, so here we go.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Please respect people trying to fix any ignorance they might have, rather than mocking that ignorance.
Is continuing to write the story I started, that's turned into a novel, a good use of my time, or am I suffering a version of the sunk cost fallacy, and I would do better abandoning the story and starting something new (and presumably more properly rationalist), now that I've gotten my writing muscles properly exercised and in working order?
Novel writing is almost never a good use of one's time, as can be seen from how much one is usually paid for it. If you're enjoying it then carry on; if not, don't.