I haven't posted on this thread for about 50 pages because a lot of the arguments just go round in circles!
In any accident there are primary causes and contributory factors, imho.
In this case the primary cause was the failure of the pilots to retard both thrust levers to idle, in that if they had completed that very basic task, then whatever followed may have been avoided, but without that action the accident was guaranteed.
I would expect in the fullness of time, that the runway surface will emerge as a significant contributory factor.
There may also be recommendations re Runoff areas, pilot interface etc, but, nonetheless, the root cause was the failure to retard the thrust levers, which should be second nature to any pilot.
[I speak as someone who has considerable hours on both Airbus and Boeing product - just to clarify my credentials]