I have been astonished at how well the world has responded to the shock. Our first world economies seem to be amazingly resilient (although perhaps I am biased by being in New Zealand so I am unaware of what is going on elsewhere).
It seems to me that just-in-time is helping us, and capitalist price signals are working.
So far I personally haven't lacked anything important (albeit, I live in a rich county. I did have to wait a month for an iPad).
Sure there is plenty of fail, but I'm not sure the obvious "better" answers would actually improve anything.
It is easy to criticise given perfect hindsight, and easy to see from my armchair what should have been done.