It will be the ultimate irony if, 20 years down the line, Deno is still around, but solely as a de facto standard / cross-platform WebAssembly execution engine.
JavaScript in Deno doesn't itself run on top of WebAssembly, so this isn't really quite like Graal. If you use Deno to run wasm, all the JS bits are basically ignored. It's a bit like using a web renderer solely for <canvas>.