I think WASM is filling in that gap to some extent. From the spec: > Any interaction with the environment, such as I/O, access to resources, or operating syst

I think WASM is filling in that gap to some extent. From the spec: > Any interaction with the environment, such as I/O, access to resources, or operating system calls, can only be performed by invoking functions provided by the embedder and imported into a WebAssembly module And IIRC, the core instruction set is reasonably compact.