The biggest negative I'm seeing is that people are moving _too fast_ to evaluate the stuff they're slinging. When you move too fast, you do not take the time to build up your taste or appreciate the nuances of different approaches to the same problem.
I am using LLMs quite a lot, but the amount of time I spend sitting on some slopped out code is I think on average much longer than a lot of my peers. What I've found is that while the original thing "works", it usually winds up being another 2-3 cycles of iterating on the original idea after I've let it settle in my head before I actually feel confident about merging.
As a result, when I add it all up, for actual "this is important" design-level concerns, I do not feel significantly more productive.