[munificent]

> Why not JavaScript engine?

Having your bottom level language semantics be dynamically typed seems to place a real cap on application performance. Given that the underlying machine code is typed, I don't think it makes sense for the lowest level language you can target to be dynamically typed.

(WebAssembly is basically an acknowledgement of that fact.)

> The biggest point being the ability to code in any language that compiles to wasm.

Conversely, I don't think WASM is a great target language either. It doesn't include GC, and I don't think it makes sense for each application to have to ship its own GC and runtime. WASM is a good target for C/C++, but not for higher level languages like Java/C#/JS/Python/Ruby/Dart.

They say they intend to support GC, but they've been saying that for a while and I haven't seen much motion yet. I don't think Fuchsia can afford to wait around for that.