What I've seen is people feel more productive, until the reality of all the subtle problems start to set in. Even skilled engineers usually only end up with 10 or 20% productivity gains by the time they reduce its usecase to where it's actually not total dog shit, or by the time they go back around and fix all the problems.
The highest quality product I know of where the creator has talked about his use of AI is ghostty, and he's not claiming massive improvements, just that it's definitely helpful.
