[beefsack]

Cargo workspaces have existed for a number of years now - the feature was released in Cargo alongside Rust 1.12 in September 2016: https://blog.rust-lang.org/2016/09/29/Rust-1.12.html

[drewtato]

The version numbers are from a little more than a year ago. Originally, it was pretty much only compilation artifacts and some CLI. https://github.com/rust-lang/cargo/pull/10563