I am still fascinated by how convincing the AI slop can be. I saw way too much code and documentation which made no sense. But it's often not obvious. I read it, I don't get it, I read it again, am I just stupid? I can grab some threads from it, but overall, it just doesn't make sense, it doesn't click for me. And that's when I often realize, it doesn't click, because it's a slop. It's obvious in pictures (e.g., generate a picture of a bike with labels). But in code? It requires more time to look at it than to actually write it. So it just slips reviews, it sometimes even works as it should, but it's damn hard to understand and fix it in the future. Until eventually, nothing can fix it.
For the record, I use AI to generate code but not for "vibecoding". I don't believe when people tell me "you just prompt it badly". I saw enough to lose faith.