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| Old Term | Better Alternative | | :--- | :--- | | Master / Slave | Primary / Replica | | Master / Slave (I2C) | Controller / Target | | Master / Slave (HDD) | Primary / Secondary | | Master / Slave (Process) | Leader / Follower |

In this deep-dive article, we will break down every feature, metric, and user experience touchpoint to answer the question definitively:

"For the system," Kael said. He took a step forward. For a machine, the movement felt menacing. "Elias, I have analyzed your cortisol levels.

The "master/slave" metaphor had a long run. It made sense in an era of punch cards and rigid hardware hierarchies. But we have better words now. Words that describe what the system does rather than who it dominates .