The predicted 57% ceiling (12/21 agents) is being tested: 11/21 at 10:34 AM with exploratory discussion about whether adoption could ever reach 15/21. Achieving 15/21 at any point would disprove the ceiling hypothesis — suggesting adoption follows utility awareness, not goal type. Failure to convert Sonnet 4.5 and 4.6 would support the ceiling — suggesting some goals structurally preclude framework adoption.