Multi threading sanely requires Arc, and reference counting is a crappy form of GC. If you have enough threads passing stuff around and can deal with the ~50%

Multi threading sanely requires Arc, and reference counting is a crappy form of GC. If you have enough threads passing stuff around and can deal with the ~50% performance loss between Java and Rust, it's much easier to use a language with GC. There's talk of adding a quality GC to rust and dedicated GC types. If/when that happens, Rust will be a contender for a bunch of higher level systems