This is far and away the biggest problem I have atm. Engineers blowing through an incredible amount of work in a short time, but when an inevitable bug bubbles up (which would happen without AI!), there's noone to question. "Hey, you changed the way transactionality was handled here, and that's made a really weird race condition happen. Why did you change it? What edge case were you trying to handle?" -- "I don't know, the AI did it". This makes chasing things down exponentially harder.

This has always been a problem in software engineering; of course -- sometimes staff have left, so you have to dig through tickets, related commits and documentation to intuit intent. But I think it's going to make for very weird drags on productivity in _new_ code that may not counter the acceleration LLMs provide, but will certainly exist.