But this is sort of the march of nines.
My knee jerk reaction to blaming ECC is "naaah". Mostly because it's such a convenient scapegoat. It happens, I'm sure, but it would not be the first explanation I reach for. I once heard someone blame "cosmic rays" on a bug that happened multiple times. You can imagine how irked I was on the dang cosmic rays hitting the same data with such consistency!
Anyways, I'm sorry if my tone sounded abrasive, I, too, have appreciated the discussion.