Zero; it won't happen. Apple's stance has been stated and unchanging for years now. Statically compiled frameworks like Xamarin are fine. Interpreters are fine

Zero; it won't happen. Apple's stance has been stated and unchanging for years now. Statically compiled frameworks like Xamarin are fine. Interpreters are fine if the app ships with the code (no dynamic patching by downloading new code) or if the code is part of a reviewed/approved in app purchase. For JavaScript you also have access to the native code JIT too. The only thing you can't do is issue new code by bypassing App Review (except web pages / web apps) or have your own non-sandboxed JIT.