[w10-1]

> these days REST and JSON (via req/resp, webhooks, or even streaming) are the modern backbone of RPC

No, they're the medium of the web.

The author is specifically addressing enterprise integration into business workflows - not showing stuff in a browser.

[SillyUsername]

How is this browser specific or mentioned to be browser? The technologies can be purely "enterprise integration" of backend services. When was swagger (openapi) for example forbidden to be used for RPC? E.g. an endpoint that doesn't just support a crud op but take an event with an operation to execute?