[alexxys]

The article talks a lot about async/await but fails to clearly state the main advantage of async code over threads. Async code in general (not only in Rust) allows a server to process thousands of client connections concurrently with minimal latency in a single thread. Even if each client request needs several seconds to process it (assuming the processing is IO-bound). One thread (or more generally, a small number of threads) is much cheaper resource-wise than thousands of threads (in a thread per client scenario).