Given that in my (small, employer-mandated) explorations with Copilot autocompletions it’s offered incorrect suggestions about a third of the time and seems to like to also suggest deprecated APIs, I’m skeptical about the current generation’s ability to be useful at even this small task.

Sure but it takes two copilots to fly a plane

Have you seen O3?

If your experience with something less than half as good as state-of-the-art is that it worked 66% of the time, I am not sure why you would be so dismissive about the future potential.