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To clarify it is the structure of the example code that I’m interested in:

1. Action is triggered by user via UI element.

2. Expensive, non-main thread work needs to get dispatched to a background queue.

3. When said work completes, dispatch back to the main thread to update the UI that notifies the user of the result.

So now: write this using structured concurrency.

Don’t tell me “well a ViewController should really only be responsible for…” Yeah, duh. You’re missing the point here.