[lilactown]

AFAIK (maybe someone else will correct me) there are two things that people run into when implementing interpreters:

1. You can't write a JIT because you need to be able to dynamically allocate executable memory, which is typically not allowed

2. The App Store needs to know up front what native methods & behavior your app accesses so that it can allow users to observe and control what your app can access. Accessing new native methods by downloading random code over the internet is not allowed

There are ways to get around (2) by ensuring you request access to everything your app could possibly access up front, but that could also lead to rejections for asking for permission for things your app doesn't actually need. It's a bit of a dice roll.

There was talk that ability to do (1) might be coming in an update a couple years ago, but no official policy change ever came of it.