Most languages' official "guides" use a more-or-less informal tone, from my experience. I've not read through the Rust Guide yet, but I'd think this is a good t

Most languages' official "guides" use a more-or-less informal tone, from my experience. I've not read through the Rust Guide yet, but I'd think this is a good thing, especially as most newcomers to Rust will be learning new concepts (its type system is very different from most languages, unless you're coming from the strongly typed functional world).