SUSTAIN THE SEAT, NOT JUST SURVIVE IT™
The most expensive career error is not underperformance — it is sustained competence in the wrong architecture, the operator who succeeds for a decade in a seat their nervous system is bracing against and calls the exhaustion normal. Promotion compounds it: the brilliant individual contributor moved into management because the org had no other reward, now failing publicly at work their substrate was never built for. This reads what a person is built to sustain, not what they can endure.
One engine. Every read through all seven layers.