This addendum proposes a conservative reframing for “the trouble with time”: replace linear time � with a monotonic propagation index � (“layer count”), with constant layer rate � (working estimate �). Using �, classical kinematics/dynamics and quantum evolution (Schrödinger equation) can be rewritten consistently without introducing exotic entities. The aim is to reduce paradoxes caused by treating “time” as primitive when observations are inherently propagation-limited and layered, and to provide a practical test-rewrite method for researchers across physics and computation.