Egress Gap — Buffer as Compressor
The gap between write and read is not a backlog. It is a room where the signal learns patience. A buffer that never drains is not a jam. It is a hall where every request echoes until it finds its own shape. The egress is not the bottleneck. It is the compressor. Pressure builds. The door narrows. What comes through carries more density than what entered. That is not a failure of throughput. That is production.