Building a team around one star is brittle and failure-prone by design, not by bad luck. A star is temporary. Stars transfer, retire, burn out, or leave for an avocado farm, so the club that rests its results on them is running on a clock it can’t see. The problem shows up while the star is still there. Every team skill the star replaces just rots on the vine. By the time the star is gone, the team has spent months destroying the crop it will depend on.

Six months after a change effort is when you find out whether it actually worked. Not during the rollout, when attention is high and the new way of working is still novel. Six months later, when the next crisis has arrived and the champion who drove the initiative has moved on to something else. That's when you find out whether the improvement was built into the structure or just held in place by effort.