My best "AI win" so far was in an area where I had to create a number of things that all followed a similar pattern. I created one hand-crafted example and created a general spec and specific ones for each component. It worked really well and I was, for a moment, experiencing a 10-30X productivity boost while having resultant code that I could review quickly and understand. It was also more consistent that I think I would have gotten from hand coding as it is easy to drift a little in terms of style and decisions.

Of course, this is all very situational and based on the problem being solved at the time. The risk with "practices" is they are generally not concerned with problem being solved and insist on applying the same template regardless.