It is presented as a smoking gun, but as an outsider to the industry, I don't have the context. How many messages do pilots exchange? How formal are they? How g

It is presented as a smoking gun, but as an outsider to the industry, I don't have the context. How many messages do pilots exchange? How formal are they? How guarded are they? In other words, was this a major report that was hushed; or one of 100,000 informal messages over company IM, some of which were statistically bound to be negative (or somewhere in between) I would imagine that in development of ANY complex technology, no matter how ultimately successful, somebody somewhere over some channel will at some point say "Well, THIS sucks". From personal experience, even for systems in the end I'm most proud of, at some point during development, I would've vented frustration... (this is not to say that 737Max Fiasco / MCAS design / any of this is justifiable; I just don't know how much that specific, seemingly casual message between two pilots, contributes value to conversation...)