Thank you for sharing the details. I spoke with Qi_ma earlier, and he said that the nodes were disconnected at around 3:00 p.m. on 18 Oct, and that the AWS failure occurred much later, but now it appears that the failure clearly had no impact on the network.
This is great news. Although Autonomi is still a very small network today, one can assume that even if it were, say, 100 times larger, it would not lose any nodes because it uses its own protocol.