Must be a terrible thing, if anything good can come out of this I hope it alerts people to the horrors of nuclear war. I am puzzled by why we speak so much about global warming but almost nobody talks about nuclear war.

Global warming is not remotely as dangerous as nuclear war. Sure it will make crops fails some places, cause water shortage for some millions, force people to move off the coast etc. But it will not kill billions of people. Nuclear war could do that.

As long as the US and Russia stockpile huge quantities of nuclear weapons the whole world is in jeopardy. The number of times nuclear war has almost gotten triggered due to mistakes like this one in Hawaii is scary to think of.

How many human errors or hardware/software failures need to happen before one day, an actual launch of nuclear missiles happen by default?

These weapons are far too dangerous to stockpile in such huge quantities. There should be a push to reduce the stockpile to something like 20-30 missiles.

It isn't hard to imagine a president in the style of Donald Trump, acting irrational and making a rash and stupid mistake which puts the world on fire.