As per my other reply to your other reply, when I've written code that actually does `await` in a loop, it already does all the work concurrently. There's a code sample that illustrates what I'm familiar with.
On the other hand, the language designers are not random framework authors. They know what they're doing. There must be some reason why `Promise.all` exists. I just don't know what it is.
To re-iterate, I understand the difference between serial and parallel tasks. But I have also found that it's possible to do parallel tasks with `await` in a loop. So I'm still missing something.