Somewhat related to the RPC argument, but HTTP is a total joke, adn therefore so is REST.

In adtech you send 204 responses a lot. The body is empty, just the headers. Headers like 'Server' and 'Date'. Apache won't let you turn Server off... 'security through obscurity' or some nonsense. Why do I need to tell an upstream server my time 50k times per second?

Zip it all up! Nope, that only applies to the body which is already empty.

Egressing traffic! A cloud provider's dream. I wonder what percentage of their revenue come from clients sending the Date header.