Интересный кусок:

A Rust contributor weighs in:

I’m a contributor to the Rust project, whose goal is zero-overhead memory safety. We support GC’d objects via “@-boxes” (the type declaration is “@T” for any type T), and one thing we have been struggling with recently is that GC touches everything in a
language. If you want to support GC but not require it, you need to very carefully design your language to support zero-overhead non-GC’d pointers. It’s a very non-trivial problem, and I don’t think it can be solved by forking JS.