And are these dependencies that get pulled and built general-purpose? I presume it is since it is published, but I have no idea if it is indeed general-purpose, or something like "internal/*/*" in Go where the code is not supposed to be used by any other codebase.
Usually they are reasonably general purpose, but somewhat less so than the top-level crate. Sometimes sub-crates are interface-only (as a lightweight alternative if you want to bring your own implementation), or a sub-crate may expose a lower-level API that works without the std library.
