I agree with many of your points and appreciate your technical assessment of the actual post-mortem aspect, but your first comment seems particularly nit picky. It's a growing trend that when a company or person fucks up, we expect a big, grandiose, sobbing apology (and when they don't, we blow a gasket - a la Snapchat).

Now, I'm not saying that I don't expect companies to be forthright and take ownership of their mistakes, as well as apologize for them, but I can't help but feeling that expecting Dropbox and others to get on their knees and kiss their users' toes when something happens is a little melodramatic. On the one hand, yes, they made a mistake - on the other, we all know that technology is flawed, and these things happen, albeit rarely.

TL;DR: Let's not make a drama out of it.