When a pilot types, he is assumed to know the a/c. Is AB different? Yep. In approved and certificated ways? Yep, no room to argue.
Sure, but here we had a "perfect storm" where the pilots were apparently not trained (properly). Then, and only then, did these design characteristics come into play. Surely that's a reasonable argument to have.
In the case of your A320 friend, I think that is exactly WHY there had been prior complacency about high-altitude training. It wasn't considered a likely issue, until now. Now there's a mad scramble to address this, and high time, too. What if he HAD found himself in a similar situation? Would he have survived? That can't be known, and I for one don't choose to gamble when the houses get tiny.
How'm I doin', guys?