Those babies are tougher than you think. I have had several sever things happen. My incubator was turned off over night, still hatched, the lights (both) blew in my hatcher for several hours, still hatched. The electricity was out for several hours, they still hatched. Even with my recent hatches, the night time temps are really cold and my incubator and hatcher temps drop several degrees at night and they still hatch on time and healthy. I assume they will still hatch after all that and keep going.... seems to work fine. NOW shipping to Hawaii.... that is abuse
I think shipped eggs have the hardest stuff to overcome, poor things. As a rule I will NOT LOOK at eggs that have to be shipped. Local is the way to go as much as possible. There will be time I may have to order shipped eggs, but I hope to keep that to a minimum. I am lucky that we have so many BYC in Middle TN and all of my chickens have just been a drive away.