[hotpotamus]

I was under the impression that AWS gives no SLAs on an individual instance level or even an AZ level, but a region should always remain up (obviously they're not 100% at that), therefore you need to thoroughly ensure your config is multi-AZ and pay AWS accordingly.

As far as actual observed reliability, I'm curious to hear any others' experiences, but that seems pretty anecdotal.

[jonobird1]

Correct, but I prefer to understand the actual downtime experienced by people over the years (eg data centre issues, network issues, unplanned server maintenance) as that data seems hard to find centrally.