For a security library to have no updates in a couple of years, I would consider it to be unmaintained and a huge risk. I don't doubt that 2016 had some great

For a security library to have no updates in a couple of years, I would consider it to be unmaintained and a huge risk. I don't doubt that 2016 had some great libraries in rust, of which a lot are still used today. But most of them are updated to use new language features like `?` instead of `try!`, new macros system, async libraries, etc.. Take a look at a library like `serde`, which has been around since 2015 (https://crates.io/crates/serde/versions https://crates.io/crates/serde/versions) and is awesome.