That depends on how these features are added. https://github.com/rust-lang/rust/blob/master/RELEASES.md https://github.com/rust-lang/rust/blob/master/RELEASES.

That depends on how these features are added. https://github.com/rust-lang/rust/blob/master/RELEASES.md https://github.com/rust-lang/rust/blob/master/RELEASES.md I would argue that cpp, despite being much older, is still adding features that are kinda backbreaking e.g. ranges.