How this page evolved

Every published version is kept. Each entry shows what changed and why. Earlier versions can be restored by moderators, but only if the material they rely on is still available.

1. Revision 5Sep 30, 2026, 7:41 PMLive

   Removed a survey poll that wasn't a close enough match to this topic.

   • · Updated “The case for: large experiments show speed-ups”.
2. Revision 4Sep 30, 2026, 7:36 PM

   Added a reader poll shown alongside published survey figures.

   • · Updated “The case for: large experiments show speed-ups”.
3. Revision 3Sep 30, 2026, 6:25 PM

   Added the large field experiments, DORA's team-level findings and the 2025 developer survey.

   • · Added section “What happens at team level”.
   • · Added section “What developers say”.
   • · Added section “Reconciling the results”.
   • · 2 new sources cited.
   • · Key takeaways were added.
   • · 4 new pieces of guidance for specific situations.
   • · 1 new open question.
4. Revision 2Sep 30, 2026, 6:25 PM

   First brief weighing the Copilot experiment against the METR slowdown result.

   • · The main finding was rewritten.
   • · The finding is now labelled “evidence” (was “interpretation”).
   • · Added section “The case for: large experiments show speed-ups”.
   • · Added section “The case against: experts in mature codebases got slower”.
   • · 3 new sources cited.
   • · The note on uncertainty changed.
   • · 2 new open questions.
5. Revision 1Sep 30, 2026, 6:25 PM

   Created the Sylo.

   • · First published version.