[pjc50]

Where's that quote about how software architecture evolves to reflect the organisational structure of the business?

Amazon does it this way because it's made of teams that are not just loosely coupled but somewhat firewalled from each other, along with a brutal internally competitive process.

[devonkim]

Conway's Law

[taneq]

Don't they have explicit rules dictating that any software must work as a service under failure-prone conditions?

[whateveracct]

More than that, internal Amazon tools make it stupidly easy to do everything-as-a-service, so it's just how everyone does it.