The problem is, the low hanging fruit, the stuff it's good at, is 90% of all software. Maybe more.

And it's getting better at the other 10% too. Two years ago ChatGPT struggled to help me with race conditions in a C++ LD_PRELOAD library. It was a side project so I dropped it. Last week Codex churned away for 10 minutes and gave me a working version with tests.