I'm not an expert here at all but

> An Airworthiness Directive was issued [...] and then throwing the cutoff switches

So the response was "there's a known-lethal fault in our product X, when it happens, do Y"

but not

"there's a known-lethal fault in our product X, withdraw X from use immediately"

Edit: given C programmers have many, many of opportunity to learn "not to do that" in an unsafe language, instead you wrote D. That's silly, why not continue to tell C programmers "don't do <dangerous thing>"? I mean, you could have completely saved yourself year of your time writing a new language which makes it hard to do <dangerous thing>, right? Just tell them not to make mistakes is better, right?