Yeah, our Swift team don't use it. How are you using it? Copilot doesn't seem supported by Xcode. It has the most features on VS Code.

It does an excellent job on Kotlin, especially tests. We find it's most fluent with Python, pretty good with JS and TS, but found several security mistakes on PHP, etc.

For boilerplate, accuracy seems a little higher than human. It wrote 1000 lines of mocks & test code in a day for me. But creatively, it's worse, there's some hallucination.

There's a marked increase in quality and accuracy in GPT-4. GPT-4 is high quality enough that it catches tons of mistakes in code reviews and can debug with a screenshot of a stacktrace. Copilot seems like it's a generation or two out of date.