Yeah, that recent post [1] gave me a bit more confidence. Ooh, and it looks like I can compile Rust to wasm with emscripten! [2] I might have to reconsider Rust.

[1] https://michaelfairley.com/blog/i-made-a-game-in-rust/

[2] https://users.rust-lang.org/t/compiling-to-the-web-with-rust...