Crash analysis - Cayman S crash at Sonoma Raceway

The crash video: • 981 Cayman S crash at ...
Why a LSD might have prevented the crash: • Why open differentials...
High level:
Lack of wisdom to stop or go slower when it rains
Not willing to back off when having too much fun
Turned off PSM (stability/traction control)
More specific:
Taking a passenger while not familar with car/track
Not being familiar with where the dry/wet lines are
Mid engine rear wheel drive car with open differential
Loss of focus at crucial moment
More technical:
Tire spun up over slippery patch, causing major yaw moment when it caught traction again on rough asphalt
Countersteered too late
Countersteered too much as a result of being too late
Came off throttle due to loss of focus
Violent tank slapper in opposite direction