Rust Version 1.66.0 has been released: https://blog.rust-lang.org/2022/12/15/Rust-1.66.0.html

Please upgrade dev-lang/rust static ebuild to v1.66.0

This could be a good end of the year opportunity to convert dev-lang/rust to a statically versioned Python autogen like dev-lang/go and dev-lang/ruby.