That's exactly where Dex might improve over Julia, with language level control over mutability and effect handlers and array access safety ... time will tell.

That's exactly where Dex might improve over Julia, with language level control over mutability and effect handlers and array access safety ... time will tell. So packages just use those features Maybe it will hit the right trade off, or maybe Julia will adopt similar language level tools, but adjusted for dynamic semantics. Is that even possible?