idle Rust questions

Some curious questions I would ask to anyone that uses Rust seriously.

What is...

• the one crate you wish would get more dev attention?
• the one toolchain¹ feature you want stabilized?
• the one toolchain¹ change you would like to see happen?
• the one service you would like to see improved?

My own answers:

• dotenv
• rustdoc-scrape-examples
• unified toolchain¹ executable (instead of 6)
• the web UI that is https://crates.io... slow and ugly