I think we can't fully exclude structural causes
I don't name this event just because structural failure still not ruled off. On the other hand, I can't remember any similar case of
almost immediate destruction of civil a/c in air at FL because of structural failure.
caused by initial destructive event on the left
Dear Prada, can you illustrate this conclusion? I'm not so familiar with A321 parts so for me it's difficult to locate debris pieces to complete picture.