The dynamic libraries that use the unstable Rust ABI are called `dylib`s, while those that use the stable C ABI are called `cdylib`s. Suppose a stable version of the Rust ABI is defined, what would be the point of putting dynamic libraries that follows this API, in the system? Only Rust would be able to open it, whereas the system shared libraries are traditionally expected to work across languages using C ABI and language-specific wrappers. By extension, this is a problem that affects all languages that has more complex features than C. Why would this be considered as a Rust flaw?
You can also link to C libs from both. I guess you could technically make a rust lib with C interface and load it from rust but that's obviously suboptimal