If you use a lot of Arc<Mutex<Box<T>>> you you probably just learn to use Rust properly and just use Arc<Mutex<T>> instead because it pretty much never makes sense to have a Box inside an Arc...
I say that as someone that thinks Rust's learning curve is the main reason it rarely makes economic sense to use it.
I say that as someone that thinks Rust's learning curve is the main reason it rarely makes economic sense to use it.