> AWS makes it annoying to be resilient as AZs aren't transparent to their users
What does transparent mean here? AWS is super clear what resources are zonal and provides tons of guidance around making things multi-AZ. AZ outages aren't exactly frequent but they're reasonably likely.
Being susceptible to AZ (or region) outages is very much an architectural decision. Or a bug that needs to be fixed (I'm sure Coinbase didn't YOLO single-AZ, they've undoubtedly learned about some edge case that needs to be fixed). Sure it may not be worth the cost/complexity for some systems but resiliency is like job one for anything in the cloud that costs money when it's down.
What does transparent mean here? AWS is super clear what resources are zonal and provides tons of guidance around making things multi-AZ. AZ outages aren't exactly frequent but they're reasonably likely.
Being susceptible to AZ (or region) outages is very much an architectural decision. Or a bug that needs to be fixed (I'm sure Coinbase didn't YOLO single-AZ, they've undoubtedly learned about some edge case that needs to be fixed). Sure it may not be worth the cost/complexity for some systems but resiliency is like job one for anything in the cloud that costs money when it's down.