[enether]

I agree that data can be valuable and even one record loss can be catastrophic.

I agree that there needs to be better documentation.

I just don't agree that losing 3 replicas each living in a different DC at once is a realistic concern. The ones that would truly be concerned about this issue would do one of two things - run RF>3 (yes, it costs more) or set up some disaster recovery strategy (e.g run in multiple regions, yes that costs more.)

Because truth be told - losing 3 AZs at once is a disaster. And even if you durably persisted to disk - all 3 disks may have become corrupt anyway.