Rust relies on static memory safety. In general you want both static and dynamic, but you can take a static type safe language and run it in processes with isol

Rust relies on static memory safety. In general you want both static and dynamic, but you can take a static type safe language and run it in processes with isolated address spaces. GC is largely orthogonal to memory safety, although it is really hard to implement GC in languages that don't have static type safety (although not impossible).