[rurban]

Problem is that Rust is not memory safe anymore, since they switched from GC to refcounting and added unsafe. Pair that with being no concurrency safety (deadlocks, races) there are only macros left which do make rust attractive.

On the other side there are proper languages which do provide all safeties and beat rust or C++ in performance, such as pony. A proper type-system does help (compile-time guaranteed), but you could also add such features to the run-time system (e.g. a GC or safe threading with a single-writer system such as parrot). With rust you don't have any of it, you have to manually add locks or mutexes into your threaded code, and try to avoid unsafe.