The implications of "magic is data" are fun. It leads to stories like Unsong where you can brute-force enumerate incantations until you find a good one. I also like the concept of Wizard's Bane. I haven't read it, but my understanding is that magic turns out to be Turing-complete, and the protagonist creates a LISP evaluator in magic, which enables them to outcast their enemies who are still doing the magical equivalent of writing assembly.