Overall, it's pretty amazing that the recovery was as fast as it was. Given the throughput of S3 API calls you can imagine the kind of capacity that's needed to do a full stop followed by a full start. Cold-starting a service when it has heavy traffic immediately pouring into it can be a nightmare.

It'd be very interesting to know what kind of tech they use at AWS to throttle or do circuit breaking to allow back-end services like the indexer to come up in a manageable way.