Always-reachable is a tax the wrong devices pay
Cellular protocols assume the UE answers whenever the control plane probes it. Measured on trace data, that assumption accounts for 23 percent of standby drain on the contested device population, and that population is 31 percent of UEs, not a long tail. The devices muting most aggressively today are exactly the ones paying the most.
Let the UE mute itself, on a schedule the network can plan against
Mute the UE is in submission. It is deployable per-UE: production networks can adopt it incrementally.
Reachability is a privacy surface
Mute sits in the Cellular and Wireless Privacy line: the control plane's right to interrupt is also its power to track, and a UE with agency over its reachability is a UE with a smaller footprint.
Reachability should be a negotiated schedule, not an obligation.