How far down the runway did he touch down and what was his airspeed? Any possible mechanical failure with brakes and reverse thrusters? What is the flight history and training of the pilots? Runway conditions wet or dry. Were flaps and slats deployed properly for his aircraft?
If outside of normal landing parameters of the amount of runway left and airspeed for that aircraft, the pilot not flying the approach should have taken control and executed a “go around.”
The NTSB will pull the flight recorder, and all these questions will be answered quickly but not likely released for a few months. I really hope for mechanical failure as I hate it when it is the pilots fault.
I’ve only watched two commentaries on YouTube, both by pilots, and they both identify the plane coming in nose down much too close to the runway, very “hot” (overspeed), and didn’t touch down nearly early enough — and they cannot fathom why there was no go-around with such an unstable approach. The plane appeared to be coming out of a t-storm and possibly the runway was wet, but, that hot and that far down the runway B4 touchdown, I don’t think the runway being wet or not made much difference. IIRC, someone said the plane exited the far end of the runway at around 100 knots.