My job isn't to write a program that shares objects between threads. My job is to write a program that responds to web requests or stores user data or responds

My job isn't to write a program that shares objects between threads. My job is to write a program that responds to web requests or stores user data or responds to queries or checks the state of certain services. In some languages and frameworks, I might need to share an object between threads to do this efficiently. In Rust there are other options, e.g. using Arc or a reference or moving the object into a task. In my years of programming Rust I've never wanted to share some object on a thread, because there are frameworks and libraries (Actix-Web, Tokio, Rayon, async-std, others) that give me a higher-level abstraction for doing this. I can understand using this as a point of comparison if you're not very familiar with the language. But I have to confess that in my three years of working with Rust, I've neer had to worry about threads. I've been able to use a library to solve my concurrency or parallelism problems so that I can go back to worrying about design or reliability concerns. This won't be everyone's perspective, after all, someone has to write those libraries. But it is mine, and I think users of such libraries far outnumber authors of such libraries.