So the main reason that doesn't work sometimes is how you are using Rust. For instance right now I'm leaning into the Rust Embassy ecosystem which is async based, the drivers need relatively deep integration with the embedded-hal-async layer which is far from trivial to do with C bindings.

In practice I end up rewriting drivers. Which sounds daunting but often times it's much easier than folks think and the resulting code is usually 1/4th or smaller the original C code. If only implement what you need sometimes drivers can be less than 100 lines of Rust.