Sure. But you have a slight problem with ABI stability, at least in Rust, if you ever want to compile an ABI compatible replacement library. Until that problem is resolved, if you want to make a useful replaceable object you need to make a C style foreign function interface and use that, something that isn't exactly convenient for Rust to Rust use, even if rather helpful for making Rust libraries usable from other languages. C++ has a very similar issue, and has had it for years, albeit one mostly resolved by the advent of stable C++ ABI standards.