> This reads like a document that's meant to convince AWS management to invest in the new chip, focusing on how it's maximally flexible for sale, not a document to convince customers to use it ...

AWS management is the customer.

Higher compute density, lower infrastructure costs, and higher performance. Those are data center selling points.

The truth of the matter is that your average external customer doesn't really care about CPU architectures if all they are doing is using serverless offerings, specially AWS Lambdas handling events. They care about what it costs them to run the services. AWS management decide if the returns on their investment is paying off and helps them lower costs and improve margins.