From the horrible audio recording it’s clear the flight path was unrecoverable from when he starts shouting on the radio, which would indicate either a stall or massively nose down attitude that’s too late to pull up from. The flight path clearly degraded pretty quickly to a loss of control accident. I don’t know much about private jet ops, esp in the states - do both pilots have full type ratings, and do they generally fly leg and leg about, or is the co-pilot more of a radio operator? Clearly there was a loss of SA before loss of control - I wonder how well they had briefed a late runway change and what their bottom line for cancelling IFR was. Does anyone have an Actual met? If both pilots peering out the window trying to acquire the runway lights then perhaps distracted from monitoring of the instruments.