Previously my main concern was with LLM's writing worse code. Now my concern is the ability to write better code than I was ever able to write before -- considering every possible potential bug and race condition and error state and what have you -- but at what cost? How much more time do you have to spend researching, designing, making decisions around every possible edge case and state?

Before, you couldn't even attempt to balance quality with speed, because you couldn't see the quality in advance. You had to wait for bug reports to come in. Now, you're confronting quality up-front in a much deeper way. Which allows for much more reliable software, but then you have to decide how much effort is worth it and how much isn't?