That's the problem. The new norm will be 10x of pre-AI productivity, nobody will be able justify hand-writing code. And until the quality bar of LLM's/their successors get much better (see e.g. comments above looking at the details in the examples given), you'll get accumulation of errors that are higher than what decent programmers get. With higher LOC and more uninspected complexity, you'll get significantly lower quality overall. The coming wave of AI-coded bugs will be fun for all.
GOTO FAIL;