(Edit: this comment came out with very wonky points and counter-arguing nothing at all, so expect headache while reading) The artwork quality on Solo Levelling is the reason it doesn't need an anime. But even though it doesn't need an anime, if a studio decided to make something, I still doubt the style fidelity could compare to one which doesn't involve drawing, like, what, 24 frames per second? Regardless, I'd still love to have some kind of Solo Levelling anime, just to see what it would be like. AMV's don't count.