Comment by rapind

I wonder if the aggregate outage time from misconfigured and over-architected high availability services is greater than the average AWS outage per year.

Similar to security, the last few 9s of availability come at a heavily increasing (log) complexity / price. The cutoff will vary case by case, and I’m sure the decision on how many 9s you need is often irrational (CEO says it can never go down! People need their pet food delivered on time!).