I've heard very inconsistent things about this, which is interesting. Often people say Rust is less productive, as there's often "makework" involved with satisfying the borrow checker. I suspect a lot of it revolves around how you perceive that sort of thing: it can be cast as both productivity (satisfying it can potentially rule out bugs) or a loss of productivity (you were already satisfied the code was correct).

But I don't have enough experience with Rust to really have formed an opinion on that yet.