Journeyed there and back again
Serious question: is Warhammer 40k really SF? I thought it had more fantasy elements than SF. Aren't there orcs and elves and shit? I think the problem with grimdark SF is that SF has traditionally been darker and more cynical than fantasy. Dystopian societies and dark plot twists are just ... normal SF.
It's also a good debate brewing.
What other things walk the line of sci-fi and fantasy, where do they fall?