> I agree; if you use dynamic `Arc`s almost everywhere in your code, what's the point in a systems PL whose essence is in managing static lifetimes? You can ha

> I agree; if you use dynamic `Arc`s almost everywhere in your code, what's the point in a systems PL whose essence is in managing static lifetimes? You can have the best of both worlds: In many cases, I simply put an object into an Arc, clone that a bunch of times, and pass/store it to wherever it's needed. Then, within loops, I pass a reference to local function calls (instead of cloning the Arc for every call). For any given v: Arc<T>, doing &*v is zero-cost – unlike in many other languages, where you'd have to pass the Arc itself, which would involve atomic increments/decrements without escape analysis.