It does, but only if you also add a redundant await. Which I still do, even in TypeScript, unless there’s a compelling performance reason not to. I disagree with the article overall, but I do agree that making asynchrony as explicit as possible is a good idea. Otherwise you end up with code like:

  async function foo(bar) {
    // ...
  }

  function nonObviousAsyncFn() {
    // ...
    return foo(quux);
  }

Explicit return types would help, but most people don’t write them unless they’re forced by a linter.