So here’s the thing. This year I fell in love wih clojure, it’s an absolute pleasure to program in. It’s also a hosted language that runs on java (primarily) or javascript (or a bunch of marginalized things). And honestly, I feel like I can make the java backend run more resource-effecient than the JS one.
IIRC they demonstrated an interaction with Siri where it asks the user for consent before enriching the data through chatgpt. So yeah, that seems to mean your data is sent out (if you consent).