What the chain actually shows
The viral sentence preserves the number but changes its object. Reporting documenting Schreier’s statement says the roughly 90 percent figure described confidence that the November 19 release date would hold, not a measurement of development completion. The mutation turns schedule confidence into a production-progress statistic.
WHAT TRACE ADDSTRACE records the subject swap explicitly and keeps a semantic before/after diff so readers can see that the number survived while the meaning did not.