I've genuinely had the same general idea (minus the ML part), and I've started working on it once but abandoned it. I might get back on that some day. Another

I've genuinely had the same general idea (minus the ML part), and I've started working on it once but abandoned it. I might get back on that some day. Another thing I considered was that, instead of the lisp, you'd have a math-y language and compose everything together. This has the added benefit that it compiles easily to GPU code. So like a chroma key thing would be a function that chooses one buffer over the other based on pixel color. You the compose that with other functions to create a frame. An APL-like language could be amazing here. I feel like there's _a lot_ of potential here.