Asm.js still runs in browsers that don't support it. Slowly, but it runs. Rust would not be able to do that unless it came with a JS recompiler from Rust to JS.

Asm.js still runs in browsers that don't support it. Slowly, but it runs. Rust would not be able to do that unless it came with a JS recompiler from Rust to JS. Not that it couldn't work, but it would be quite strange.