I haven't written anything in Rust yet but one of its most interesting aspects is its support for linear types. I expect that will share the same kind of perspective enriching attribute of learning logic, array or functional paradigms. While it's certainly not the first language to support substructural types, it looks the only one with a decent chance of developing a meaningful ecosystem.

The linear logic of J.-Y. Girard suggests a new type system for functional languages, one which supports operations that ``change the world''. Values belonging to a linear type must be used exactly once: like the world, they cannot be duplicated or destroyed. Such values require no reference counting or garbage collection, and safely admit destructive array update

http://homepages.inf.ed.ac.uk/wadler/topics/linear-logic.htm...

An interesting bit of trivia about linear types is they are in some sense the closest thing to programming a quantum computer this side of qubits (where no cloning dictates qubit variables can only be used once in a function term).