Because of SQLite. The SQLite official WASM build is a very complicated emscripten build, so if you want to write a SQLite extension for the WASM build, you need to statically compile it into the complex emscripten build process. This is hard to do in general, but especially for Rust
That being said, I find WASM projects that are written entirely in Rust to be pleasant, more pleasant than C WASM projects. But for SQLite extensions specifically, Rust/WASM gets a bit harder
That being said, I find WASM projects that are written entirely in Rust to be pleasant, more pleasant than C WASM projects. But for SQLite extensions specifically, Rust/WASM gets a bit harder