The PM builder isn't invading engineering. It's killing the prioritization ritual that was always theater - and the gate that separates it from vibe coding in production.

I bet against Pix in 2021 because I read adoption with the wrong lens. Rogers had the manual on a shelf for sixty years. DHM would have caught it in any roadmap review. Both ignored, both screaming.

Open source activity in May 2026: PRs, reviews, issues, comments across multiple repositories.

Meta's 50:1 ratio isn't flat. Real flat teams are a maturity filter, not an org chart decision.