I feel like rust has some good sweet spots right now. I care about these but maybe not everyone else does.

- Parsing untrusted inputs. nom[1] is a joy to use, and lets you kind of effortlessly and fearlessly process random input from wherever and turn it into useful data structures. If your data is very regular or in a standard format, then serde[3] is very hard to beat if it just boils down to 'derive(Deserialize, Serialize)' on your Rust struct.

- Bulk data processing. rayon[2] makes pegging your machine easy if you have a lot of work do to, and the Rust semantics around thread safety, data ownership, and explicit copying make it kind of trivial to reason about how your data gets from input to output and tuning it to be crazy fast.

- Generic systems language. Maybe this one is personal, but I find it's more productive to write generic cli applications and whatnot in Rust over C, ruby, or python. There are some nice libs to make part of this pleasant (structopt[4]) but this really boils down to reliability. Because Rust makes it obvious where things can fail so I can deal with it I have way higher 'just works' outcomes in Rust than other languages. I might spend slightly more time making it compile, but I spend basically zero time debugging runtime failures and this is kind of indescribably amazing.

[1] https://docs.rs/nom/6.1.0/nom/index.html

[2] https://docs.rs/rayon/1.5.0/rayon/

[3] https://serde.rs/

[4] https://docs.rs/structopt/0.3.21/structopt/