> When #developers are allowed to use #AI tools, they take 19% longer to complete issues—a significant slowdown that goes against #developer beliefs and expert forecasts. This gap between perception and reality is striking: developers expected AI to speed them up by 24%, and even after experiencing the slowdown, they still believed AI had sped them up by 20%.

https://metr.org/blog/2025-07-10-early-2025-ai-experienced-os-dev-study/

This is consistent with my experience. Everyone I work with who went all-in on AI now takes longer, produces more bugs, "writes" worse tests, and is more difficult to work with.

The pointless AI-generated commit messages alone, with their references to nonexistent issues, etc., are driving me crazy. I now have to look at every single diff to understand what's going on.

But maybe that's a good thing after all. My understanding of the projects keeps improving, while theirs is getting worse.