[alextingle]

> None of that happened, and not because all the bugs were fixed.

No one is in a position to assert that. We have very little idea how fragile our civilization is. Perhaps it's pretty robust, and networks of interconnected problems (like Y2K) stand no chance of snowballing out of control. Or perhaps it's really, really fragile, and surprisingly little stands between us and a profound collapse.

It's very difficult to be certain, because it's such a complicated system, and one that we can't really test to destruction.

Would all the Y2K bugs have caused a widespread systematic failure if they'd gone un-fixed? Probably not... but maybe? Just like all low-probability, high impact risks, it's very hard for us to reason about.

How much money is it wise to spend on averting the risk of giant asteroid impacts? Hard to say. Probably more than you think, though.