Wed. morning’s first presser:
After steep descent (3,500 ft/min), it appears pilot leveled off at 6,500 feet for last 41 sec before impact
The Hypoxia theory is getting stronger.
That makes it less likely. Hypoxia does not explain the descent. All pilot hypoxia events in the last generation have resulted in fuel starvation at altitude.
Go back to you emergency descent flow. See the first step listed sets 10,000 feet? That is standard Airbus procedure. How did it descend to 6,500?
Fire and smoke would be far likelier because it could have disabled the automation and the crew.