My experience is mainly with C++, but from my own evaluation I'm x2 to x3 more productive overall in Rust than in C++. The reasons are a simpler build system th

My experience is mainly with C++, but from my own evaluation I'm x2 to x3 more productive overall in Rust than in C++. The reasons are a simpler build system that makes using the ecosystem faster, more expressive type system (iterators with combinators, sum types), the safety part that allows to not accidentally introduce UB and to not waste time with static and runtime analysis, shortening debug and review time. This compounds over time to give a better maintenance time. I don't have a similar evaluation for C <-> Rust, but I suspect the result would be even more skewed in Rust's favor: sure, you might be writing individual lines faster in C, but the lack of iterators, generics, traits and RAII, and the relative difficulty to use dependencies means that you will waste a lot of time reinventing the wheel, often suboptimally.