https://arstechnica.com/ai/2026/10/ai-coding-agents-generate-more-code-but-not-more-software/

> Any efficiency increased during the actual coding phase, the study authors find, is “absorbed by downstream constraints in the production process”; as “the code review process significantly increases in length, pull requests are more likely to require revisions, and reviewers leave more comments.”

Either your Sr. engineers become burnt-out bottlenecks, doing the work another human should've, or they check out and slop gets deployed to production.

Ask me how I know.