https://users.rust-lang.org/t/rust-roadmap-tracker/9231/3
https://github.com/rust-lang/rust-roadmap

2018
https://blog.rust-lang.org/2018/03/12/roadmap.html
https://readrust.net/rust-2018/
https://github.com/rust-lang/rfcs/pull/2314
rfcs/text/2314-roadmap-2018.md

2017
https://blog.rust-lang.org/2017/02/06/roadmap.html
https://www.reddit.com/r/haskell/comments/5shoyu/rusts_2017_roadmap_increase_developer_productivity/