A July 2025 METR trial dropped a twist: seasoned devs using Cursor with Claude 3.5/3.7 moved **19% slower** - while thinking they were **20% faster**. Chalk it up to AI-induced confidence inflation. Faros AI tracked over **10,000 developers**. More AI didn’t mean more done. It meant more juggling, more PRs, same velocity. Apiiro's 2024 report? Not subtle. Privilege escalation paths up 322%. Critical CVEs in AI-generated code? 2.5x higher.