Don't forget how <??> is built-in and was heavily abused to create insecure, incomprehensible spaghetti messes. You'd have to try really hard to make callback

Don't forget how <??> is built-in and was heavily abused to create insecure, incomprehensible spaghetti messes. You'd have to try really hard to make callback labyrinths in JS match the mess that came out of the above combined with runtime-as-template-engine. This was basically idiomatic at the time.