Even their transfer rates between AZs _in the same region_ are expensive, given they presumably own the fiber? This aligns with their “you should be in multipl

Even their transfer rates between AZs _in the same region_ are expensive, given they presumably own the fiber? This aligns with their “you should be in multiple AZs” sales strategy, because self-hosted and third-party services can’t replicate data between AZs without expensive bandwidth costs, while their own managed services (ElastiCache, RDS, etc) can offer replication between zones for free.