Were just waiting on WASM to be able to access the DOM APIs directly, and then all languages will be first class citizens on the web, and then RIP JavaScript.
Is that even a stated goal? I swear we've been waiting for that to exist for the better part of a decade. It would solve so many issues and comes up in every discussion about Javascript, yet the powers that be seem to have zero interest in pushing this forward.
Well they still have runtimes, but yes they can be pretty minimal.
You're still shipping a load of libraries that come for free with JS though, e.g. with Rust WASM string formatting and unicode support always ends up being annoyingly huge, and that's built in to JS engines. There's also collections (Map, Set), etc.