> Once a critical mass of pieces (planes/crew) were out of position the whole network fell apart, and it’s large enough that it seems like neither the humans no

> Once a critical mass of pieces (planes/crew) were out of position the whole network fell apart, and it’s large enough that it seems like neither the humans nor software can easily reason about how to resume operations. Hence the need for a “full system reboot” over many days. We had days like that in the UK but with the rail system. And it when it happens it’s also due to snow. We’ve seen it on global scale recently due to covid putting ships in the wrong places so that optimised shipping routes become a mess.