I doubt we're really the exception, and I think a good developer from the before times can still guide AI to produce a reasonably maintainable codebase over time. Most likely, a bad developer from the before times will still be able to guide AI to produce a mess. But yeah. It seems to me that the latest models produce above average code, based on the messes I've seen (and helped produce) over the last 25 years or so. It's not as good as what I'd build by hand these days, but it's good enough, when in the right hands.