Rust 1.64 introduced a really nice Cargo feature: workspace inheritance:

When working with collections of related libraries or binary crates in one Cargo workspace, you can now avoid duplication of common field values between crates, such as common version numbers, repository URLs, or rust-version. This also helps keep these values in sync between crates when updating them. For more details, see workspace.package, workspace.dependencies, and "inheriting a dependency from a workspace".

Adopting this would simplify our package maintenance quite a bit!