Just to make sure: You're talking about the same Aurora Serverless which consists of a single database server instance in a single availability zone without any guarantees regarding availability in case the availability zone goes down? To quote the AWS documentation [1]:
> The Aurora Serverless failover time is currently undefined […]
Don't get me wrong: I really like the idea of Aurora Serverless, but with the current feature set it isn't very compelling.
How many small companies would have any failover if their colocated database server went down? Not only would they not have a warm or hot standby, they probably wouldn’t have up to date data.
Because Aurora separates computation capacity and storage, the storage volume for the cluster is spread across multiple AZs. Your data remains available even if outages affect the DB instance or the associated AZ.
> The Aurora Serverless failover time is currently undefined […]
Don't get me wrong: I really like the idea of Aurora Serverless, but with the current feature set it isn't very compelling.
[1]: https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide...