[stusmall]

I've had to use valgrind a bit in Rust. Not much but the need is there. It really depends on the product you are working with. Rust is an extremely flexible language and can be used in many spaces. From high level abstract functional code to low level C-like code on a microcontroller. Some use cases would never image using unsafe, some can't live without it. For most FFI to C is just a fact of life, so it comes up somewhere.

When I used it before I was working on a Rust modules that was loaded in by nginx. This was before there were official or even community bindings to nginx.... so there was a lot of opportunity for mistakes.