> Better interoperability AFAIK, the examples you give all target a basic C ABI [0] or can be made to target the same ABI. In Rust, it means targeting wasm32-u

> Better interoperability AFAIK, the examples you give all target a basic C ABI [0] or can be made to target the same ABI. In Rust, it means targeting wasm32-unknown-emscripten The Rust team is also working on a "WASM ABI"[1] which would be useful in taking advantage of stuff like multi-value returns, and other compilers could just choose to target that. More likely, the C ABI on WASM will be updated to account for missing features, and that'll be the standard for interoperability in the WASM ecosystem. [0]: https://github.com/WebAssembly/tool-conventions/blob/main/BasicCABI.md https://github.com/WebAssembly/tool-conventions/blob/main/Ba... [1]: https://github.com/rust-lang/lang-team/blob/master/design-meeting-minutes/2021-04-21-wasm-abi.md https://github.com/rust-lang/lang-team/blob/master/design-me...