'Long landing/excessive time in the flare/Float, … is certainly analysed in our FDM' # 357
That is an important aspect, but not the only one. Of greater importance is where the aircraft stopped - sufficiently slow, vs where it could have stopped; from this a comparison between the planned safety margin and actual available in the conditions, a check both on human contribution and the reported runway conditions.
Re several contributing factors - how many in this accident ?
The info-graphic on slide 20, 'Overrun Characteristics'
https://www.icao.int/EURNAT/Other%20...FR%20PPT01.pdf (slow loading file) shows the issues, indicating the relative frequency or overall significance.
* GRF - Global Reporting Format - for runway condition; to be introduced this year together with revised landing distance performance which can be related to the reported conditions.
Also:-
https://www.icao.int/EURNAT/Other%20...hp%20PPT06.pdf
and
https://www.icao.int/Meetings/grf201...-%20Airbus.pdf