At the time the savestate architecture was first implemented Serde was not yet stable. Since then it's become the de-facto serialization library for Rust, superseeding the hacky RustcEncodable/RustcEncodable.
While there's no emergency it'd be nice to move to Serde now that it's stabilized. It shouldn't be too difficult but it's quite a big change which impacts both rustation and rustation-libretro. In particular the current binary serializer would have to be ported (or rewritten). I'm not sure how straightforward that would be.
At the time the savestate architecture was first implemented Serde was not yet stable. Since then it's become the de-facto serialization library for Rust, superseeding the hacky RustcEncodable/RustcEncodable.
While there's no emergency it'd be nice to move to Serde now that it's stabilized. It shouldn't be too difficult but it's quite a big change which impacts both rustation and rustation-libretro. In particular the current binary serializer would have to be ported (or rewritten). I'm not sure how straightforward that would be.